problem solving skill in java

Enhancing Problem-Solving Skills in Java Programming: A Comprehensive Guide

Avinash bidkar, introduction.

Problem-solving skills lie at the heart of successful Java programming. In the realm of software development, the ability to dissect complex challenges, design efficient solutions, and implement them through code is paramount. This article delves into the art of honing problem-solving skills within the context of Java programming. By combining logical thinking, algorithmic strategies, and effective coding practice, developers can elevate their problem-solving skills in Java programming and create elegant, robust solutions.

Understanding Problem-Solving in Java Programming

Problem-solving in the realm of Java programming refers to the systematic approach of identifying, analyzing, and solving coding challenges. In a software developer course, you’ll learn that it involves breaking down intricate problems into manageable components and devising logical strategies to tackle them. Logical thinking and algorithmic understanding play a pivotal role in this process, allowing developers to construct well-structured and optimized solutions. Such skills are indispensable for crafting software that is not only functional but also efficient.

Guidelines for Enhancing Problem-Solving Skills

Here’s a rundown of the guidelines to enhance your problem-Solving skills.

Breaking down complex problems: Start by breaking down a complex problem into smaller sub-problems. This approach simplifies the overall challenge and makes it easier to develop individual solutions for each component.
Developing a systematic approach: Establish a systematic approach to problem-solving. Define the problem, identify the required inputs and desired outputs, and outline the steps needed to bridge the gap.
Understanding before coding: Resist the urge to immediately dive into coding. Spend ample time understanding the problem statement, its nuances, and potential edge cases. A solid understanding is the foundation of an effective solution.
Utilizing pseudocode and flowcharts: Before writing actual code, create pseudocode or flowcharts to outline the logical flow of your solution. This helps in visualizing the process and identifying potential flaws early on.
Incremental development and testing: Build your solution incrementally, testing each component as you progress. This approach allows you to catch errors early and refine your solution iteratively.

Effective Coding Practice for Problem-Solving

Regular coding practice is essential for honing problem-solving skills. Engage in a variety of coding challenges that span different difficulty levels and problem domains. Online coding platforms, such as LeetCode, HackerRank, and CodeSignal, offer a wealth of practice problems and allow you to benchmark your skills against a global community of programmers. Mastering problem-solving skills in Java programming involves a combination of understanding the language's features, algorithms, and data structures, as well as practicing systematic approaches to tackling challenges.

Applying Algorithms for Efficient Solutions

Algorithms are step-by-step instructions for solving a specific problem. Learning and implementing various algorithms can greatly improve your problem-solving capabilities. Start by understanding the fundamental algorithms such as sorting, searching, and graph traversal. As you become more comfortable, move on to more advanced algorithms like dynamic programming, greedy algorithms, and divide-and-conquer techniques. Regularly practicing these algorithms through coding exercises will help you develop a toolkit of strategies to approach different types of problems effectively.

Strengthening Logical Thinking Abilities

Logical thinking is the foundation of problem-solving. It involves breaking down complex problems into smaller, manageable parts and understanding the relationships between different elements. To enhance your logical thinking skills, practice solving puzzles, brain teasers, and mathematical problems. Additionally, try to analyze the structure of various programming challenges and identify patterns and dependencies. Cultivating this skill will enable you to devise creative and efficient solutions to intricate programming problems.

Learning from Real-world Examples

Real-world examples provide practical insights into applying problem-solving skills in Java programming. Let's explore a few examples:

Example 1: Finding the factorial of a number: Break down the problem into smaller steps, creating a loop to multiply consecutive integers.

Example 2: Implementing binary search: Utilize the divide and conquer strategy to narrow down the search space and efficiently find the target element.

Example 3: Solving the Fibonacci sequence: Employ dynamic programming to optimize recursive calculations and generate Fibonacci numbers efficiently.

Overcoming Common Challenges

When solving programming problems, you're likely to encounter common challenges such as bugs, runtime errors, and inefficiencies. Embrace these challenges as opportunities to learn. Debugging is a crucial aspect of problem-solving. Cultivate a systematic approach to identifying and fixing errors by using tools like debugging environments and print statements. Additionally, optimize your code by analyzing time and space complexity, identifying bottlenecks, and making informed decisions to improve efficiency.

Putting Problem-Solving Skills to the Test

Practicing problem-solving skills is essential for improvement. Utilize coding platforms like LeetCode, HackerRank, and Codeforces to access a wide range of programming challenges. These platforms often categorize problems by difficulty, allowing you to gradually progress from easy to more complex tasks. Set aside dedicated time for consistent practice, and challenge yourself by attempting problems that initially seem daunting.

Collaborate with fellow programmers, engage in coding competitions, and participate in online forums to gain exposure to different problem-solving approaches.

An essential talent for Java programmers is the ability to solve problems. Developers can become skilled problem solvers by following logical rules, practicing code often, learning algorithms, and cultivating logical thought. The secret to maximizing the potential of problem-solving abilities is constant learning combined with practical experience. As you set out on this path, keep in mind that every obstacle you overcome will help you get closer to mastering Java programming and being able to create unique, effective solutions.

How can I improve my problem-solving skills in Java programming?

Enhance your problem-solving skills in Java by practicing algorithmic challenges, breaking down complex problems into smaller tasks, and leveraging data structures effectively. Regular coding practice and participating in coding competitions can also contribute to your skill development.

What strategies can I employ to tackle challenging Java programming problems?

Approach difficult Java programming problems step by step, analyze the problem requirements thoroughly, devise a clear plan, and implement it incrementally. Utilize debugging tools and collaborate with peers to gain different perspectives on problem-solving techniques.

Are there any specific resources for practicing Java problem-solving?

Numerous online platforms offer Java programming challenges and exercises, such as LeetCode, HackerRank, and Codeforces. These resources provide a range of problems to solve, helping you refine your problem-solving skills and Java proficiency.

How do I optimize my Java code for better problem-solving outcomes?

Optimize Java code by choosing efficient data structures, minimizing unnecessary iterations, and employing dynamic programming or memoization techniques when appropriate. Regularly review and refactor your code to improve its clarity and performance.

Q. Can problem-solving in Java programming benefit my overall programming proficiency?

Enhancing your problem-solving skills in Java translates to improved programming proficiency in general. The analytical mindset and structured problem-solving techniques you develop will prove valuable across various programming languages and domains.

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How to improve problem solving skills in java programming.

Most developers would agree that Java problem solving skills are one of the most important skills to have when it comes to programming. After all, what good is a developer who can’t solve problems? But even for the best Java developers, problem solving skills in Java programming can be a difficult task.

That’s why we’ve put together this list of 6 easy tips to improve problem solving skills in programming (Java).

What Do We Mean By Programming Problem Solving Skills?

Problem solving skills are the ability to identify and solve problems. When it comes to Java development, this means being able to find solutions to coding challenges, debugging errors, and working through difficult logic puzzles.

Java Problem Solving For Beginners (With An Example):

Let’s take a look at an example of how to use problem-solving skills in Java. Suppose you have a list of numbers, and you want to find the sum of the even numbers in that list. This is what your code might look like:

In this code, we are using a for loop to iterate through the list of numbers. We then use a conditional statement to determine if the integer passed to the conditional statement is even or not. If it is an even number, we add it to our sum variable.

Here’s how you would solve this problem without using any of the available tools in Java:

Use a for loop to iterate through each number in your list. Use modulus (%) and double-check your work to make sure that you know which numbers are even.

With a for loop, this might not look too difficult. But what happens when the problem gets more complex? What happens when you have a list of 100 or 1000 numbers instead of just 6? You would have to use nested for loops, and it could get very confusing.

Why Is Learning Problem Solving Skills In Java So Crucial?

While having adequate skills in problem-solving, Java developers can create ample amount of opportunities for themselves, like:

They can meet the high demand for Java developers and command high salaries.
They can ace software engineering, as problem solving is a critical skill for any software engineer.
They can get support from the largest development communities in the world.

Ways to improve Problem Solving Skills In Competitive Programming

How To Improve Problem Solving Skills In Competitive Programming:

1. practice makes perfect with skills of problem solving.

The only way to get better at solving problems is by practicing. The more complex the situation, the more you will need to rely on your problem solving skills and ability to think outside the box. If you’re one of those developers that are always looking for a challenge, take online boot camps where companies post coding challenges and Java programmers compete against each other to find solutions as quickly as possible.

2. Use the Power of Google (or other dev tools)

There may be times when your code works perfectly fine but you still don’t know how it actually works. When you run into these times, don’t be afraid to use Google! There are times when a simple Google search is all you need to complete the task at hand.

3. Find a Friend for Code Reviews

If you have a colleague or friend who’s also passionate about Java development, find them and do code reviews together! Code reviews are an excellent learning experience for any developer. Not only will they help improve your skills of problem solving in Java, but they will also teach you new things that you might not know about the language.

4. Try Pair Programming

Pair programming is a great way to work through bugs and complex logic problems with another person. When coding in pairs, it becomes much easier to solve difficult problems since there are two brains working on it—and if one of those programmers knows how to solve the problem, the other one might just learn something new.

Read the Related Article – what is pair programming ?

5. Use Debuggers to Your Advantage

Debuggers are a developer’s best friend—they will save you time and headaches when it comes to debugging errors in code. If you don’t have any experience with Java debuggers, now would be a great time to try one out! Just knowing how to use a debugger can go a long way in helping you solve difficult problems.

6. Keep an Open Mind

When solving a problem, there will be some developers who try to use the “standard” way of doing things. For some problems, this might work perfectly fine—but when you’re trying to solve a difficult problem, sometimes it’s best not to follow convention and think outside the box!

Being able to solve problems is one of the essential web developer skills , but Java developers, in particular, need strong skills in problem-solving to succeed. If you’re looking for help with how to improve your problem solving abilities in Java, start by practicing more often and using the power of Google or other dev tools when needed. You can also find friends who are passionate about programming to do code reviews together—or if you want some hands-on experience try pair programming! Debuggers will save time and headaches as well, so make sure that you know how they work before tackling difficult problems on your own. The key is practice; give these tips a shot today and see what happens!

Ans- Skills of Problem solving in Java are the ability to identify and solve problems. This includes being able to understand the problem, come up with a solution, and then code that solution. Java developers need these skills to be successful because they often have to work on projects with tight deadlines and limited resources.

Ans- The best time to use Google is when a developer doesn’t know how to solve a problem that they’re facing. There’s almost always someone who has run into the same problem, so it’s important to know how to use Google to find other solutions.

Ans- Pair programming is a method of working on a task with another person. One developer codes while the other reviews, and together they work through the problem. It’s a great way to learn while you work, and it can be especially helpful for more difficult problems that require the knowledge of both developers.

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1. Write Hello World Program in Java

2. write a program in java to add two numbers., 3. write a program to swap two numbers, 4. write a java program to convert integer numbers and binary numbers..

5. Write a Program to Find Factorial of a Number in Java
6. Write a Java Program to Add two Complex Numbers

7. Write a Program to Calculate Simple Interest in Java

8. Write a Program to Print the Pascal’s Triangle in Java

9. Write a Program to Find Sum of Fibonacci Series Number

10. write a program to print pyramid number pattern in java., 11. write a java program to print pattern., 12. write a java program to print pattern., 13. java program to print patterns., 14. write a java program to compute the sum of array elements., 15. write a java program to find the largest element in array, 16. write java program to find the tranpose of matrix, 17. java array program for array rotation, 18. java array program to remove duplicate elements from an array, 19. java array program to remove all occurrences of an element in an array, 20. java program to check whether a string is a palindrome, 21. java string program to check anagram, 22. java string program to reverse a string, 23. java string program to remove leading zeros, 24. write a java program for linear search., 25. write a binary search program in java., 26. java program for bubble sort..

27. Write a Program for Insertion Sort in Java

28. Java Program for Selection Sort.

29. java program for merge sort., 30. java program for quicksort., java exercises – basic to advanced java practice programs with solutions.

Looking for Java exercises to test your Java skills, then explore our topic-wise Java practice exercises? Here you will get 25 plus practice problems that help to upscale your Java skills.

As we know Java is one of the most popular languages because of its robust and secure nature. But, programmers often find it difficult to find a platform for Java Practice Online. In this article, we have provided Java Practice Programs. That covers various Java Core Topics that can help users with Java Practice.

So, with ado further take a look at our free Java Exercises to practice and develop your Java programming skills. Our Java programming exercises Practice Questions from all the major topics like loops, object-oriented programming, exception handling, and many more.

Topic Wise Java Exercises List

Pattern Programs in Java
Array Programs in Java
String Programs in Java

Java Practice Problems for Searching Algorithms

Practice problems in java sorting algorithms, more java practice exercises.

Java Practice Programs

This Java exercise is designed to deepen your understanding and refine your Java coding skills, these programs offer hands-on experience in solving real-world problems, reinforcing key concepts, and mastering Java programming fundamentals. Whether you’re a beginner who looking to build a solid foundation or a professional developer aiming to sharpen your expertise, our Java practice programs provide an invaluable opportunity to sharpen your craft and excel in Java programming language .

The solution to the Problem is mentioned below:

Click Here for the Solution

5. write a program to find factorial of a number in java., 6. write a java program to add two complex numbers., 8. write a program to print the pascal’s triangle in java, java exercise on pattern.

Array Exercises in Java

String Exercises in Java

Time Complexity: O(N) Space Complexity: O(N)

Time Complexity: O(logN) Space Complexity: O(N)

Time Complexity: O(N 2 ) Space Complexity: O(1)

27. Write a Program for Insertion Sort in Java.

Time Complexity: O(N logN) Space Complexity: O(N)

Time Complexity: O(N logN) Space Complexity: O(1)

After completing these Java exercises you are a step closer to becoming an advanced Java programmer. We hope these exercises have helped you understand Java better and you can solve beginner to advanced-level questions on Java programming.

Solving these Java programming exercise questions will not only help you master theory concepts but also grasp their practical applications, which is very useful in job interviews.

Java Array Exercise Java String Exercise Java Collection Exercise Click Here – To Practice Java Online please check our Practice Portal.

Java Exercise – FAQ

1. how to do java projects for beginners.

To do Java projects you need to know the fundamentals of Java programming. Then you need to select the desired Java project you want to work on. Plan and execute the code to finish the project. Some beginner-level Java projects include: Reversing a String Number Guessing Game Creating a Calculator Simple Banking Application Basic Android Application

2. Is Java easy for beginners?

As a programming language, Java is considered moderately easy to learn. It is unique from other languages due to its lengthy syntax. As a beginner, you can learn beginner to advanced Java in 6 to 18 months.

3. Why Java is used?

Java provides many advantages and uses, some of which are: Platform-independent Robust and secure Object-oriented Popular & in-demand Vast ecosystem

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Master Java Problem-Solving with Easy Tips and Tricks

Java programming, known for its robustness and object-oriented features, is a popular choice among developers. However, becoming proficient in Java requires more than just understanding syntax and features; it demands strong problem-solving skills.

This blog offers practical advice and strategies to enhance your problem-solving abilities, helping you tackle Java programming challenges more effectively.

Understanding the Problem

Before you can solve a problem, you must fully understand it. Read the problem statement multiple times and identify the key requirements. Create a list of inputs and expected outputs. Clarifying these elements upfront can prevent confusion and save time later.

Tips for Understanding Complex Problems:

Break it Down: Divide the problem into smaller, manageable parts. This method, known as decomposition, helps in isolating specific components of the problem, making complex issues more approachable and easier to understand.
Ask Questions: If in a team or class setting, don’t hesitate to seek clarifications. Asking targeted questions can uncover hidden details and assumptions, ensuring that all team members have a shared understanding of the problem and its challenges.
Use Diagrams: Visual aids like flow charts or diagrams can help you visualise the problem. These tools not only provide a clearer understanding of the processes involved but also aid in identifying potential issues and inefficiencies in the workflow.
Simplify the Language: Often, problem statements can be cluttered with technical jargon or unnecessary details. Try to rephrase the problem in simpler terms to ensure that you clearly understand what is being asked. This can help avoid misunderstandings and focus on the core issue.
Identify Constraints and Limitations: Understanding the constraints within which you must solve the problem is crucial. This could include time constraints, memory usage, input size limitations, or specific conditions that must be met. Knowing these can guide your solution approach and prevent you from exploring unfeasible options.
Review Similar Problems: Look for problems that have been solved before which are similar to the one you’re facing. Studying how these problems were approached and resolved can provide valuable insights and strategies that might be applicable to your current challenge. This can also help in adapting known solutions to fit new problems.

Planning Your Approach

Once you understand the problem, plan your approach. A good plan acts as a roadmap, guiding you through the coding process.

Steps to Plan Effectively:

Algorithm Writing: Start by outlining the steps you need to take, in the form of pseudocode or a simple algorithm.
Discuss Solutions: If possible, discuss your planned approach with peers or mentors to refine it.
Choose the Right Data Structures: Select appropriate data structures that will efficiently manage and organise your data.

Writing the Code

With a solid plan in place, you can begin coding. Keep your code clean and organised, which will help you and others understand and debug it if needed.

Best Practices for Coding:

Keep It Simple: Write clear and concise code; avoid unnecessary complexity.
Comment Often: Use comments to explain the purpose of sections of code, especially if the logic isn’t immediately obvious.
Stick to Conventions: Follow Java coding standards and conventions for readability and maintainability.

Testing and Debugging

Testing is crucial to ensure your solution works as expected. Start testing with simple cases and gradually move to more complex ones.

Effective Testing Techniques:

Unit Testing: Test individual parts (units) of your code to ensure each part works correctly.
Integration Testing: After unit testing, check how different parts of your program work together.
Use Debugging Tools: Utilize Java debugging tools to step through your code and identify where things go wrong.

Learn from Mistakes

Mistakes are inevitable when programming. Instead of getting frustrated, use them as learning opportunities.

How to Learn from Programming Errors:

Analyze Your Errors: Understand what went wrong and why.
Research Solutions: Use resources such as Stack Overflow, Java forums, or documentation.
Practice Makes Perfect: Regular practice can help you minimize similar mistakes in the future.

Enhancing Your Skills Through Challenges

Challenges like coding competitions or hackathons are excellent for improving your problem-solving skills. They push you to think creatively and efficiently under time constraints.

Benefits of Participating in Coding Challenges:

Exposure to Diverse Problems: You’ll encounter a wide range of problems, which can broaden your experience.
Learn from Peers: Seeing how others solve problems can introduce you to new techniques and ideas.
Improve Under Pressure: You’ll learn to solve problems under time constraints, which can improve your speed and efficiency in daily tasks.

Staying Updated and Learning Continuously

Java is ever-evolving, so staying updated with the latest developments is crucial. Follow blogs, read books, and take courses to keep your skills sharp.

Resources for Continuous Learning:

Join Courses: Institutes like Maasmind offer best Java training in chennai that range from beginner to advanced levels.
Read Books: Comprehensive Java books can deepen your understanding and provide new perspectives on problem-solving.
Join Communities: Online communities and local meetups can be invaluable for support and knowledge sharing.
Participate in Workshops and Seminars: Regularly attending workshops and seminars can provide insights into the latest Java technologies and best practices. These events are often led by industry experts and provide a great opportunity for hands-on learning and networking.
Subscribe to Java Newsletters: Many Java-focused newsletters are available that deliver the latest news, articles, and tutorials directly to your inbox. Subscribing to these can help you stay informed about new libraries, frameworks, and Java versions without actively searching for this information.
Contribute to Open Source Projects: Getting involved in open source projects can significantly enhance your understanding of Java and its practical applications. It allows you to work on real-world problems, interact with other experienced developers, and contribute to the Java community, all of which can accelerate your learning and professional growth.

Enhancing your problem-solving skills in Java programming requires dedication, practice, and a proactive approach to learning. By understanding problems deeply, planning your solutions, writing clean code, and learning from every experience, you can become an adept Java programmer.

Engaging in Java training in Chennai can further accelerate your learning curve, providing structured guidance and hands-on experience.

Remember, the journey of mastering Java is continuous, and each problem solved is a step forward in your programming career. This approach not only builds your skills but also prepares you for professional challenges ahead.

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Java Coding Practice

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In Java programming, commands are essential instructions that tell the computer what to do. These commands are written in a specific way so the computer can understand and execute them. Every program in Java is a set of commands. At the beginning of your Java programming practice , it’s good to know a few basic principles:

In Java, each command ends with a semicolon;
A command can't exist on its own: it’s a part of a method, and method is part of a class;
Method (procedure, function) is a sequence of commands. Methods define the behavior of an object.

Here is an example of the command:

The command System.out.println("Hello, World!"); tells the computer to display the text inside the quotation marks.

If you want to display a number and not text, then you do not need to put quotation marks. You can simply write the number. Or an arithmetic operation. For example:

Command to display the number 1.

A command in which two numbers are summed and their sum (10) is displayed.

As we discussed in the basic rules, a command cannot exist on its own in Java. It must be within a method, and a method must be within a class. Here is the simplest program that prints the string "Hello, World!".

We have a class called HelloWorld , a method called main() , and the command System.out.println("Hello, World!") . You may not understand everything in the code yet, but that's okay! You'll learn more about it later. The good news is that you can already write your first program with the knowledge you've gained.

Attention! You can add comments in your code. Comments in Java are lines of code that are ignored by the compiler, but you can mark with them your code to make it clear for you and other programmers.

Single-line comments start with two forward slashes (//) and end at the end of the line. In example above we have a comment //here we print the text out

You can read the theory on this topic here , here , and here . But try practicing first!

Explore the Java coding exercises for practicing with commands below. First, read the conditions, scroll down to the Solution box, and type your solution. Then, click Verify (above the Conditions box) to check the correctness of your program.

The two main types in Java are String and int. We store strings/text in String, and integers (whole numbers) in int. We have already used strings and integers in previous examples without explicit declaration, by specifying them directly in the System.out.println() operator.

In the first case “I am a string” is a String in the second case 5 is an integer of type int. However, most often, in order to manipulate data, variables must be declared before being used in the program. To do this, you need to specify the type of the variable and its name. You can also set a variable to a specific value, or you can do this later. Example:

Here we declared a variable called a but didn't give it any value, declared a variable b and gave it the value 5 , declared a string called s and gave it the value Hello, World!

Attention! In Java, the = sign is not an equals sign, but an assignment operator. That is, the variable (you can imagine it as an empty box) is assigned the value that is on the right (you can imagine that this value was put in the empty box).

We created an integer variable named a with the first command and assigned it the value 5 with the second command.

Before moving on to practice, let's look at an example program where we will declare variables and assign values to them:

In the program, we first declared an int variable named a but did not immediately assign it a value. Then we declared an int variable named b and "put" the value 5 in it. Then we declared a string named s and assigned it the value "Hello, World!" After that, we assigned the value 2 to the variable a that we declared earlier, and then we printed the variable a, the sum of the variables a and b, and the variable s to the screen

This program will display the following:

We already know how to print to the console, but how do we read from it? For this, we use the Scanner class. To use Scanner, we first need to create an instance of the class. We can do this with the following code:

Once we have created an instance of Scanner, we can use the next() method to read input from the console or nextInt() if we should read an integer.

The following code reads a number from the console and prints it to the console:

Here we first import a library scanner, then ask a user to enter a number. Later we created a scanner to read the user's input and print the input out.

This code will print the following output in case of user’s input is 5:

More information about the topic you could read here , here , and here .

See the exercises on Types and keyboard input to practice Java coding:

Conditions and If statements in Java allow your program to make decisions. For example, you can use them to check if a user has entered a valid password, or to determine whether a number is even or odd. For this purpose, there’s an 'if/else statement' in Java.

The syntax for an if statement is as follows:

Here could be one or more conditions in if and zero or one condition in else.

Here's a simple example:

In this example, we check if the variable "age" is greater than or equal to 18. If it is, we print "You are an adult." If not, we print "You are a minor."

Here are some Java practice exercises to understand Conditions and If statements:

In Java, a "boolean" is a data type that can have one of two values: true or false. Here's a simple example:

The output of this program is here:

In addition to representing true or false values, booleans in Java can be combined using logical operators. Here, we introduce the logical AND (&&) and logical OR (||) operators.

&& (AND) returns true if both operands are true. In our example, isBothFunAndEasy is true because Java is fun (isJavaFun is true) and coding is not easy (isCodingEasy is false).
|| (OR) returns true if at least one operand is true. In our example, isEitherFunOrEasy is true because Java is fun (isJavaFun is true), even though coding is not easy (isCodingEasy is false).
The NOT operator (!) is unary, meaning it operates on a single boolean value. It negates the value, so !isCodingEasy is true because it reverses the false value of isCodingEasy.

So the output of this program is:

More information about the topic you could read here , and here .

Here are some Java exercises to practice booleans:

With loops, you can execute any command or a block of commands multiple times. The construction of the while loop is:

Loops are essential in programming to execute a block of code repeatedly. Java provides two commonly used loops: while and for.

1. while Loop: The while loop continues executing a block of code as long as a specified condition is true. Firstly, the condition is checked. While it’s true, the body of the loop (commands) is executed. If the condition is always true, the loop will repeat infinitely, and if the condition is false, the commands in a loop will never be executed.

In this example, the code inside the while loop will run repeatedly as long as count is less than or equal to 5.

2. for Loop: The for loop is used for iterating a specific number of times.

In this for loop, we initialize i to 1, specify the condition i <= 5, and increment i by 1 in each iteration. It will print "Count: 1" to "Count: 5."

Here are some Java coding challenges to practice the loops:

An array in Java is a data structure that allows you to store multiple values of the same type under a single variable name. It acts as a container for elements that can be accessed using an index.

What you should know about arrays in Java:

Indexing: Elements in an array are indexed, starting from 0. You can access elements by specifying their index in square brackets after the array name, like myArray[0] to access the first element.
Initialization: To use an array, you must declare and initialize it. You specify the array's type and its length. For example, to create an integer array that can hold five values: int[] myArray = new int[5];
Populating: After initialization, you can populate the array by assigning values to its elements. All elements should be of the same data type. For instance, myArray[0] = 10; myArray[1] = 20;.
Default Values: Arrays are initialized with default values. For objects, this is null, and for primitive types (int, double, boolean, etc.), it's typically 0, 0.0, or false.

In this example, we create an integer array, assign values to its elements, and access an element using indexing.

In Java, methods are like mini-programs within your main program. They are used to perform specific tasks, making your code more organized and manageable. Methods take a set of instructions and encapsulate them under a single name for easy reuse. Here's how you declare a method:

public is an access modifier that defines who can use the method. In this case, public means the method can be accessed from anywhere in your program.Read more about modifiers here .
static means the method belongs to the class itself, rather than an instance of the class. It's used for the main method, allowing it to run without creating an object.
void indicates that the method doesn't return any value. If it did, you would replace void with the data type of the returned value.

In this example, we have a main method (the entry point of the program) and a customMethod that we've defined. The main method calls customMethod, which prints a message. This illustrates how methods help organize and reuse code in Java, making it more efficient and readable.

In this example, we have a main method that calls the add method with two numbers (5 and 3). The add method calculates the sum and returns it. The result is then printed in the main method.

All composite types in Java consist of simpler ones, up until we end up with primitive types. An example of a primitive type is int, while String is a composite type that stores its data as a table of characters (primitive type char). Here are some examples of primitive types in Java:

int: Used for storing whole numbers (integers). Example: int age = 25;
double: Used for storing numbers with a decimal point. Example: double price = 19.99;
char: Used for storing single characters. Example: char grade = 'A';
boolean: Used for storing true or false values. Example: boolean isJavaFun = true;
String: Used for storing text (a sequence of characters). Example: String greeting = "Hello, World!";

Simple types are grouped into composite types, that are called classes. Example:

We declared a composite type Person and stored the data in a String (name) and int variable for an age of a person. Since composite types include many primitive types, they take up more memory than variables of the primitive types.

See the exercises for a coding practice in Java data types:

String is the most popular class in Java programs. Its objects are stored in a memory in a special way. The structure of this class is rather simple: there’s a character array (char array) inside, that stores all the characters of the string.

String class also has many helper classes to simplify working with strings in Java, and a lot of methods. Here’s what you can do while working with strings: compare them, search for substrings, and create new substrings.

Example of comparing strings using the equals() method.

Also you can check if a string contains a substring using the contains() method.

You can create a new substring from an existing string using the substring() method.

More information about the topic you could read here , here , here , here , and here .

Here are some Java programming exercises to practice the strings:

In Java, objects are instances of classes that you can create to represent and work with real-world entities or concepts. Here's how you can create objects:

First, you need to define a class that describes the properties and behaviors of your object. You can then create an object of that class using the new keyword like this:

It invokes the constructor of a class.If the constructor takes arguments, you can pass them within the parentheses. For example, to create an object of class Person with the name "Jane" and age 25, you would write:

Suppose you want to create a simple Person class with a name property and a sayHello method. Here's how you do it:

In this example, we defined a Person class with a name property and a sayHello method. We then created two Person objects (person1 and person2) and used them to represent individuals with different names.

Here are some coding challenges in Java object creation:

Static classes and methods in Java are used to create members that belong to the class itself, rather than to instances of the class. They can be accessed without creating an object of the class.

Static methods and classes are useful when you want to define utility methods or encapsulate related classes within a larger class without requiring an instance of the outer class. They are often used in various Java libraries and frameworks for organizing and providing utility functions.

You declare them with the static modifier.

Static Methods

A static method is a method that belongs to the class rather than any specific instance. You can call a static method using the class name, without creating an object of that class.

In this example, the add method is static. You can directly call it using Calculator.add(5, 3)

Static Classes

In Java, you can also have static nested classes, which are classes defined within another class and marked as static. These static nested classes can be accessed using the outer class's name.

In this example, Student is a static nested class within the School class. You can access it using School.Student.

More information about the topic you could read here , here , here , and here .

See below the exercises on Static classes and methods in our Java coding practice for beginners:

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About this course

You’ll need to pass a technical interview if you want to be hired for a technical role. Don’t worry — these interviews are pretty predictable, and the same kinds of problems appear again and again. Even if you don’t have a technical interview scheduled just yet, practicing these common problems will help you grow as a programmer and problem solver, and will help you write cleaner and better code.

Algorithmic Complexity

Learn about algorithmic complexity conceptually and in Java.

Technical Interview Skills

Learn how to approach problem-solving for technical interviews.

Java Interview Problems

Practice your Java data structures and algorithm skills with some concrete problems!

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Solve a real-world problem using Java

What is your favorite open source Java IDE?

Pixabay. CC0.

As I wrote in the first two articles in this series, I enjoy solving small problems by writing small programs in different languages, so I can compare the different ways they approach the solution. The example I'm using in this series is dividing bulk supplies into hampers of similar value to distribute to struggling neighbors in your community, which you can read about in the first article in this series.

In the first article, I solved this problem using the Groovy programming language , which is like Python in many ways, but syntactically it's more like C and Java. In the second article, I solved it in Python with a very similar design and effort, which demonstrates the resemblance between the languages.

Now I'll try it in Java .

The Java solution

When working in Java, I find myself declaring utility classes to hold tuples of data (the new record feature is going to be great for that), rather than using the language support for maps offered in Groovy and Python. This is because Java encourages creating maps that map one specific type to another specific type, but in Groovy or Python, it's cool to have a map with mixed-type keys and mixed-type values.

The first task is to define these utility classes, and the first is the Unit class:

There's nothing too startling here. I effectively created a class whose instances are immutable since there are no setters for fields item , brand , or price and they are declared private . As a general rule, I don't see value in creating a mutable data structure unless I'm going to mutate it; and in this application, I don't see any value in mutating the Unit class.

While more effort is required to create these utility classes, creating them encourages a bit more design effort than just using a map, which can be a good thing. In this case, I realized that a bulk package is composed of a number of individual units, so I created the Pack class:

Closing thoughts

The similarities in the "working code" with the Groovy original are obvious—the close relationship between Groovy and Java is evident. Groovy and Java diverged in a few ways in things that were added to Java after Groovy was released, such as the var vs. def keywords and the superficial similarities and differences between Groovy closures and Java lambdas. Moreover, the whole Java streams framework adds a great deal of power and expressiveness to the Java platform (full disclosure, in case it's not obvious—I am but a babe in the Java streams woods).

Java's intent to use maps for mapping instances of a single type to instances of another single type pushes you to use utility classes, or tuples, instead of the more inherently flexible intents in Groovy maps (which are basically just Map<Object,Object> plus a lot of syntactic sugar to vanish the kinds of casting and instanceof hassles that you would create in Java) or in Python. The bonus from this is the opportunity to apply some real design effort to these utility classes, which pays off at least insofar as it instills good habits in the programmer.

Aside from the utility classes, there isn't a lot of additional ceremony nor boilerplate in the Java code compared to the Groovy code. Well, except that you need to add a bunch of imports and wrap the "working code" in a class definition, which might look like this:

The same fiddly bits are necessary in Java as they are in Groovy and Python when it comes to grabbing stuff out of the list of Unit instances for the hampers, involving random numbers, loops through remaining units, etc.

Another issue worth mentioning—this isn't a particularly efficient approach. Removing elements from ArrayLists , being careless about repeated expressions, and a few other things make this less suitable for a huge redistribution problem. I've been a bit more careful here to stick with integer data. But at least it's quite quick to execute.

Yes, I'm still using the dreaded while { … } and for { … } . I still haven't thought of a way to use map and reduce style stream processing in conjunction with a random selection of units for repackaging. Can you?

Stay tuned for the next articles in this series, with versions in Julia and Go .

Why I use Java

There are probably better languages than Java, depending on work requirements. But I haven't seen anything yet to pull me away.

Managing a non-profit organization's supply chain with Groovy

Let's use Groovy to solve a charity's distribution problem.

Use Python to solve a charity's business problem

Comparing how different programming languages solve the same problem is fun and instructive. Next up, Python.

Java, Java, Java: Object-Oriented Problem Solving

(4 reviews)

Ralph Morelli, Trinity College

Ralph Walde, Trinity College

Publisher: Ralph Morelli, Ralph Walde

Language: English

Formats Available

Conditions of use.

Learn more about reviews.

Reviewed by Onyeka Emebo, Assistant Professor, Virginia Tech on 12/28/21

Comprehensiveness rating: 5 see less

The text adequately addresses areas under Object Oriented Programming using Java as a Programming Language for Introduction to Computer Science courses. It gently introduces basic concepts in computer, objects and java using problem solving approaches and gradually builds up to more advanced Java technologies in such a simplified manner that can be easily understood. The text also provides a table of content at the beginning and a summary of points for each chapter with exercises.

Content Accuracy rating: 4

The text content is accurate, without errors and unbiased. There is however some links that needs to be updated.

Relevance/Longevity rating: 4

While the field of computer science with particular emphasis to programming as it relates to this text is constantly evolving, the approach taken by this text to teach the essentials is likely to persist. The code, tested in Java 8, should continue to work with new Java releases. Updates to the text can be done easily by the way it has been written.

Clarity rating: 5

The text is written in a clear and easy to understand manner. The objectives, explanations, examples and exercises are clear and easy to follow. The codes are well commented to aid readability.

Consistency rating: 4

The text is highly consistent in both structure and terminology. It starts each chapter with objectives and outline and concludes with summary, exercises and solutions. However, some codes within the chapters are put in figures while others are not, this could be confusing.

Modularity rating: 5

The text is divided in 17 chapters (0 - 16) and 8 appendices (A – H). Each chapter is further divided into sections and subsections. This breakdown makes it easier for instructors to apportion sections to students at different times within the course.

Organization/Structure/Flow rating: 5

The text is organized in a manner that is logical and it flows well from section to section. The structure makes navigation from chapter to chapter easier.

Interface rating: 3

I reviewed the PDF version and it looks good to a large extent. The links in the table of contents are working properly. There are clickable links within the text to different figures, sections, such as appendices, and external websites. However, there are some issues with some figure titles, e.g., figure 12, 1.10, 2.7, 2.10, 2.14, etc. are cut off. Some hyperlinks for some figures missing e.g., figure 2.8 and some figures don’t have titles.

Grammatical Errors rating: 5

The text contains no grammatical errors.

Cultural Relevance rating: 5

The text is culturally neutral. The examples are unbiased in the way it has been presented.

Reviewed by Ghaith Husari, Assistant Professor, East Tennessee State University on 4/17/20

This book covers Object-Oriented Programming under JAVA. It introduces the concepts of object-oriented programming and they are used for problem-solving. This book covers all the relevant areas of Object-Oriented Programming under Java. Also, it... read more

Content Accuracy rating: 5

The Object-Oriented concepts and implementation example shown in code samples are accurate and easy to learn as the code samples are aligned with the concept being discussed. Some links and URLs are out-dated but they have little to no impact on student learning. However, I would add a note that says "some of the links and URLs might not up-to-date. However, they can be found using search engines if necessary"

Programming languages get updated regularly to include new and easier functions to use. While it is impossible for a textbook to include every function, this textbook provides a great learning opportunity that allows students to build the muscle to be able to learn more about Java online. When it comes to Object-Oriented concepts, the book is extremely relevant and up-to-date

The textbook is very easy to understand and the code sample is both clear (code readability) and relevant.

Consistency rating: 5

The text and the terms it contains are consistent. Also, the textbook follows a consistent theme.

The textbook chapters are divided into sections and subsections that are shown also in the table of contents which can be used to visit each section.

The textbook consists of seventeen chapters that are organized in a logical manner. The more general concepts such as problem-solving and programing are placed at the beginning, then the chapters introduce the discuss Object-Oriented Programming come after the general chapters. The more advanced topics such as socket programming and data structures and algorithms come towards the end. This made a lot of sense to me.

Interface rating: 5

The textbook is easily accessible online and it can be downloaded to open with Edge or Adobe Reader without any problems.

No grammar issues have been noticed.

This textbook is neutral and unbiased.

Reviewed by Guanyu Tian, Assistant Professor, Fontbonne University on 6/19/18

Comprehensiveness rating: 4 see less

This textbook covers Object-Oriented Programming with Java programming language pretty well. It starts with the concept of Objects and problem solving skills and then dive into Java programming language syntax. Overall, it appropriately covers all areas of the subject including the main principles of Object-Oriented Programming and Java programming language. In the later chapters, this textbook also introduces advanced topics such as concurrent programming, network/socket programming and data structures. The textbook provides table of contents at the beginning and index of terms at the end. Each chapter also provides a list of key words and a list of important concepts and technique terms.

Content Accuracy rating: 3

The content of the textbook is mostly accurate. Many URLs linked to Java documentations and APIs are not up-to-date.

Many URLs to Java references are not up-to-date and many online samples are not accessible. Nonetheless, the concepts of Object-Oriented Programming and Java programming language syntax are mostly current. Any updates to the contents of the textbook can be implemented with minimal effort.

The text is easy to understand. However, some of the texts are not displayed on adobe reader.

Consistency rating: 3

The text is consistent in terms of framework. Each chapter starts with introduction to a problem, and then discussion and design of the solution with UML diagrams; then Java is used to implement the solution(s). However, there is some level of inconsistency in terms of Java code samples. For example, some Java code examples use appropriate indentations and new lines, but some examples do not. This may confuse students.

Each chapter is divided into different sections and subsections. A student can go to each section of a chapter by clicking it in the Table of Contents.

Organization/Structure/Flow rating: 3

The topics in this text book are organized in a reasonable order. It starts with general concepts of computer and program design, then Objects and Java Programming Language, and then advanced topics in computer programming. It would be better if the textbook starts with Java programming language and then principles of Object Oriented programming.

Some of the texts are not displayed in the reviewer's adobe reader. Many diagrams and figures are poorly drawn. Overall, the interface of the book is one area that needs improvement.

No major grammar issues has been noticed.

The text of this textbook is a neutral and unbiased.

Overall, this textbook covers materials of Object-Oriented Programming with Java taught in first or second-year computer science course. However, the contents of Java programming language has not been up-to-date and the interface of the book is very poor compare to similar books the reviewer has used for learning and teaching the same materials. Some sample codes are not well written or inconsistent in terms of the use of indentation and new lines. Many URLs are obsolete and the web pages are not accessible.

Reviewed by Homer Sharafi, Adjunct Faculty Member, Northern Virginia Community College on 6/20/17

The textbook includes the material that is typically covered in a college-level CS1 course. Using an “early objects” approach and Java as the programming language, the authors go over problem-solving techniques based on object-oriented programming principles. In addition to an Index of terms towards the end of the text, each chapter summary includes the technical terms used, along with a bulleted-list of important points discussed in that chapter.

The computer science concepts and the accompanying sample code are accurate and error-free; however, the only issue is the fact that the URLs that make references to various aspects of Java, such as API documentation, JDK, and the Java Language Specification, have not been updated to reflect the fact that Sun Microsystems was acquired by Oracle back in 2010.

Like other software systems, Java is updated on a regular basis; nonetheless, the computer science concepts discussed in the textbook are based on standard undergraduate curriculum taught in a CS1 course. Therefore, any updates to the textbook would need to be with regard to the version of Java with minimal effort.

Clarity rating: 4

The authors deliver clear explanations of the computer science concepts and the accompanying Java language features.

There is a consistent theme throughout much of the text: A topic is introduced and discussed within the context of a problem. Its solution is then designed and explained using UML diagrams; finally, Java is used to illustrate how the solution is implemented on the computer.

Each chapter is divided into sections that can easily be identified within the table of contents. Therefore, it’s fairly easy for a student to pick and choose a section in a chapter and work on the other sections later. Throughout each chapter, there are self-study exercises to incrementally test understanding of the covered material. Solutions to those self-study exercises are then provided towards the end of the chapter. In addition, each chapter includes end-of-chapter exercises that can be used to assess one’s understanding of the computer science concepts as well as the various features of Java.

The book consists of seventeen chapters; however, a typical CS1 course would need the material in the first ten chapters only, and those chapters are set up in a logical manner, allowing one to go through the material sequentially. Depending on how fast he first ten chapters are covered during the course of a semester, an instructor may choose from the last seven chapters in the text to introduce more advanced topics in computer science and/or Java.

Interface rating: 1

The textbook can be accessed online or opened using Acrobat Reader with no problem. There are no issues, as long as navigation is done one page after another manually. However, when browsing through the table of contents (TOC) or the Index, the entries are not set up using any live links. That is, you cannot click on a page number associated with an item within the TOC or the Index to go directly to that page.

Grammatical Errors rating: 3

This reviewer did not come across any such issues, while going through the text.

This is a computing textbook, where the contents are presented using technical terms. Culturally, the textbook is completely neutral and unbiased in terms of how the material is presented.

0 Computers, Objects, and Java
1 Java Program Design and Development
2 Objects: Defining, Creating, and Using
3 Methods: Communicating with Objects
4 Input/Output: Designing the User Interface
5 Java Data and Operators
6 Control Structures
7 Strings and String Processing
8 Inheritance and Polymorphism
9 Arrays and Array Processing
10 Exceptions: When Things Go Wrong
11 Files and Streams
12 Recursive Problem Solving
13 Graphical User Interfaces
14 Threads and Concurrent Programming
15 Sockets and Networking
16 Data Structures: Lists, Stacks, and Queues

Ancillary Material

Ralph Morelli, Ralph Walde

About the Book

We have designed this third edition of Java, Java, Java to be suitable for a typical Introduction to Computer Science (CS1) course or for a slightly more advanced Java as a Second Language course. This edition retains the “objects first” approach to programming and problem solving that was characteristic of the first two editions. Throughout the text we emphasize careful coverage of Java language features, introductory programming concepts, and object-oriented design principles.

The third edition retains many of the features of the first two editions, including:

Early Introduction of Objects
Emphasis on Object Oriented Design (OOD)
Unified Modeling Language (UML) Diagrams
Self-study Exercises with Answers
Programming, Debugging, and Design Tips.
From the Java Library Sections
Object-Oriented Design Sections
End-of-Chapter Exercises
Companion Web Site, with Power Points and other Resources

The In the Laboratory sections from the first two editions have been moved onto the book's Companion Web Site. Table 1 shows the Table of Contents for the third edition.

About the Contributors

Ralph Morelli, Professor of Computer Science Emeritus. Morelli has been teaching at Trinity College since 1985, the same year the computer science major was first offered. More recently, he was one of the Principal Investigators (PIs) for the Humanitarian Free and Open Source Software (HFOSS) project, an NSF-funded effort to get undergraduates engaged in building free and open source software that benefits the public. In summer 2011 a team of Trinity HFOSS students and faculty traveled to Haiti to build an open source mobile application that helps manage beneficiaries for a humanitarian aid organization. Currently Morelli is the PI of the Mobile CSP project, an NSF-funded effort to train high school teachers in CT and elsewhere to teach the emerging Advanced Placement CS Principles course that is being created by the College Board. The main goal of this NSF initiative is to increase access to computer science among underrepresented groups, including girls, African Americans, and Hispanic Americans. The Mobile CSP course teaches students to create mobile apps to serve their community. In summer 2014, a group of 20 Mobile CSP students spent their summer building mobile apps for the city of Hartford.

Ralph Walde. Dr. Walde has given Trinity 28 years of distinguished service, first as a Professor of Mathematics and now as a Professor of Computer Science. He was instrumental in helping to establish and nourish computing at Trinity and was one of the founding members of the Computer Science Department.

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▼Java Exercises
Basic Part-I
Basic Part-II
Conditional Statement
Recursive Methods
Java Enum Types
Exception Handling
Java Inheritance
Java Abstract Classes
Java Thread
Java Multithreading
Java Lambda expression
Java Generic Method
Object-Oriented Programming
Java Interface
Java Encapsulation
Java Polymorphism
File Input-Output
Regular Expression
▼JavaFx Exercises
JavaFx Exercises Home
..More to come..

Java Programming Exercises, Practice, Solution

Java exercises.

Java is the foundation for virtually every type of networked application and is the global standard for developing and delivering embedded and mobile applications, games, Web-based content, and enterprise software. With more than 9 million developers worldwide, Java enables you to efficiently develop, deploy and use exciting applications and services.

The best way we learn anything is by practice and exercise questions. Here you have the opportunity to practice the Java programming language concepts by solving the exercises starting from basic to more complex exercises. A sample solution is provided for each exercise. It is recommended to do these exercises by yourself first before checking the solution.

Hope, these exercises help you to improve your Java programming coding skills. Currently, following sections are available, we are working hard to add more exercises .... Happy Coding!

List of Java Exercises:

Basic Exercises Part-I [ 150 Exercises with Solution ]
Basic Exercises Part-II [ 99 Exercises with Solution ]
Methods [ 23 Exercises with Solution ]
Data Types Exercises [ 15 Exercises with Solution ]
Java Enum Types Exercises [ 5 Exercises with Solution ]
Conditional Statement Exercises [ 32 Exercises with Solution ]
Java recursive method Exercises [ 15 Exercises with Solution ]
Math [ 27 Exercises with Solution ]
Numbers [ 28 Exercises with Solution ]
Java Inheritance Exercises [ 9 exercises with solution ]
Java Abstract Classes Exercises [ 12 exercises with solution ]
Java Interface Exercises [ 11 exercises with solution ]
Java Encapsulation Exercises [ 7 exercises with solution ]
Java Polymorphism Exercises [ 12 exercises with solution ]
Object-Oriented Programming [ 30 Exercises with Solution ]
Exercises on handling and managing exceptions in Java [ 7 Exercises with Solution ]
Java Lambda expression Exercises [ 25 exercises with solution ]
Streams [ 8 Exercises with Solution ]
Java Thread Exercises [ 7 exercises with solution ]
Java Miltithreading Exercises [ 10 exercises with solution ]
Array [ 77 Exercises with Solution ]
Stack [ 29 Exercises with Solution ]
Collection [ 126 Exercises with Solution ]
String [ 107 Exercises with Solution ]
Input-Output-File-System [ 18 Exercises with Solution ]
Date Time [ 44 Exercises with Solution ]
Java Generic Methods [ 7 exercises with solution ]
Java Unit Test [ 10 Exercises with Solution ]
Search [ 7 Exercises with Solution ]
Sorting [ 19 Exercises with Solution ]
Regular Expression [ 30 Exercises with Solution ]
JavaFX [ 70 Exercises with Solution ]

Note: If you are not habituated with Java programming you can learn from the following :

Java Programming Language

More to Come !

Popularity of Programming Language Worldwide, Nov 2023 compared to a year ago:

Rank	Language	Share	Trend
1	Python	27.99 %	+0.0 %
2	Java	15.91 %	-0.8%
3	Javascript	9.18 %	-0.3%
4	C/C++	6.76 %	+0.2%
5	C#	6.67 %	-0.3 %
6	PHP	4.86 %	-0.3 %
7	R	4.45%	+0.4%
8	TypeScript	2.95 %	+0.1%
9	Swift	2.7 %	+0.6%
10	Objective-C	2.32%	+0.2%
11	Rust	1.98%	+0.3%
12	Go	1.98%	-0.0%
13	Kotlin	1.76 %	-0.1%
14	Matlab	1.6 %	+0.0%
15	Ada	1.02%	+0.2%
16	Ruby	1.0 %	-0.1 %
17	Dart	0.99 %	+0.1 %
18	Powershell	0.93 %	+0.0 %
19	VBA	0.93 %	-0.1 %
20	Scala	0.62 %	-0.1 %
21	Lua	0.62 %	0.0 %
22	Abap	0.58 %	+0.1 %
23	Visual Basic	0.55 %	-0.1 %
24	Julia	0.35 %	-0.0 %
25	Groovy	0.31 %	-0.1 %
26	Perl	0.31 %	-0.1 %
27	Haskell	0.27 %	-0.0 %
28	Cobol	0.25 %	-0.1 %
29	Delphi/Pascal	0.18 %	+0.2 %

Source : https://pypl.github.io/PYPL.html

TIOBE Index for November 2023

Nov 2023	Nov 2022	Programming Language	Ratings	Change
1	1	Python	14.16%	-3.02%
2	2	C	11.77%	-3.31%
3	4	C++	10.36%	-0.39%
4	3	Java	8.35%	-3.63%
5	5	C#	7.65%	+3.40%
6	7	JavaScript	3.21%	+0.47%
7	10	PHP	2.30%	+0.61%
8	6	Visual Basic	2.10%	-2.01%
9	9	SQL	1.88%	+0.07%
10	8	Assembly language	1.35%	-0.83%
11	17	Scratch	1.31%	+0.43%
12	24	Fortran	1.30%	+0.74%
13	11	Go	1.19%	+0.05%
14	15	MATLAB	1.15%	+0.14%
15	28	Kotlin	1.15%	+0.68%
16	14	Delphi/Object Pascal	1.14%	+0.07%
17	18	Swift	1.04%	+0.17%
18	19	Ruby	0.99%	+0.14%
19	12	R	0.93%	-0.20%
20	20	Rust	0.91%	+0.16%

Source : https://www.tiobe.com/tiobe-index/

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Java is the developer's first choice to write code. It is a very popular and successful programming language to build applications. The count of the Java developer is increased day by day. It is mostly used to develop web and mobile applications. In order to become a successful developer, we have to improve our coding skills. Getting basics knowledge of any language is not enough.

Only by reading books and learning the basics of Java we cannot improve our coding skills. We have to do the following things regularly for that:

We first have to clear our basics of Java. We should have basic knowledge of Java for further constructing the Java skills. We should have to take the help of the sources like YouTube videos, books, or other study material for that. There is no need to get everything at once, understand concepts and code slowly, and then we can gradually pick up speed.

We should have knowledge of the following concept of Java:

Coding is everything in Java or any other programming language. We can put the code at the top of the list because it is a very difficult and essential part of the programming. There are several concepts like multi-threading and exception handling, which are theoretically easy to understand, but we cannot understand their actual working without writing code for it. There is only one way to find out the mistakes in error handling, designing and threading, i.e., . It helps us to identify the issue related to the:

Books and online videos are the sources that help us to improve our coding skills. We are done with the coding section, and we know that the code is the central piece of programming. Our code can be good or bad, and to identify that books and videos are best. There are several books available that guide us to solve the issues in our code. Like books, online videos are also helpful in finding the error in our code and improving programming skills.

In Java programming, the most critical things are , and . We should have to do the practice all these three things regularly and solve problems related to them. In problem-solving, solid knowledge of data structure plays an important role because the data structure is a key piece of any program.

In the same way, knowledge of key programming principles, search and sort algorithms, and other well-known algorithms help us to improve the coding skills in Java. Several books, tutorials, and videos are available in the market related to them, which help us make ourselves expert.

There is another important thing, i.e., which help us to improve our coding skills. Reading the code is more difficult in comparison to reading the blog. We should have to get the code of our fellow programmers, Java SDK code, code of open source project or our proprietary code, and by reading the code, try to find the answer to the following questions:

After that, we need to find patterns and develop navigation skills. It is very boring and difficult, but it will be very easy with time and have a good code sense. It will alert us when we make mistakes and also help us to understand others' mistakes.

Testing is one of the important parts of the development of the application. Unit testing plays an important role in testing Java applications. JUnit is one of the important tools for it. Like Coding and designing, unit testing is a bit more complex for beginners or average programmers. The unit test helps a lot in improving better names, abstraction, interfaces, abstract class design and overall code quality. So, writing unit tests for Java applications is also very important for improving coding skills.

and are the two essential testing framework to perform the unit test of the Java application.

are another thing that is very helpful to improve our coding skills. Code Review is a development practice which helps us to become a good programmer. Code review often helps that the code we think is rock solid and has some bugs that only other programmers can see, Code Review does it for us.

If we get a chance to work in that company that performs unit testing and has code review as a discipline, then we are very lucky. In that case, we are likely to be a better programmer than the rest. Unit testing and Code reviews are the two things that help us to improve our coding skills.

The best way to improve our coding skills is to start working on projects. We can start working as a freelancer too for improving coding skills. When we work on the live project, we face several issues. In order to solve them, we need to figure out the place where the problem was raised, and sometimes we also need to take the help of books, online videos and our fellow programmers. In that way, working on a live project is the best way to improve coding skills.

Talking to fellow programmers and discussing code with him is the best way to improve coding skills. Our mind tends to involve more when we talk and listen to others. We can often not see the issue and problem in our code, and when we discuss it with our teammates, we find gaps, missing requirements, bugs, and design flaws.

Programming is not just sitting and code. We need to talk, listen, and hang out with fellow programmers. Participating in events is also very helpful to improve coding skills.

Dedication is the most important thing to learn any programming language or to improve coding skills. This is the last thing which we need to do because if we don't have dedication, we can learn or improve anything. We'll only be a good java programmer if we truly dedicate ourselves to it.

All the things which we discussed above help us a lot to improve our coding skills. However, the last thing, i.e., , is required to follow all the remaining things.

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What's the best way to learn problem-solving skills required for programming?

My girlfriend has been learning Java for a few months now. She's doing great and seems to have a good grip on programming basics (syntax, operators, loops (still needs some work), creating methods, etc.). She's gone through most of two books on Java and is working on a course in Udemy.

The area she really seems to be struggling in is the problem-solving required in book / course exercises. For example: find all of the prime numbers between two numbers; find all even numbers in a number (e.g. 123456 being 2, 4, 6); extract the first and last character from a string, etc.. They seem to teach the programming essentials for those exercises, but not the methodologies. She knows what even and prime numbers are among most of the other things being asked, but people aren't really presented with problems like this outside of mathematics and programming (I guess).

I have programming experience from (don't laugh) VBA. I think that only goes so far in terms of understanding Java, but has helped me with programming concepts and problem-solving skills. I don't remember struggling too much with those aspects (of course I had to look many things up over time). I do what I can to help, but I don't really know Java so am probably not doing the best job of it. I'm a bit concerned that she's getting frustrated with Java because of something that might not be 100% Java related. She has a really strong drive to do this, but I feel that her just pushing through these courses and books isn't helping her develop some other underlying skills needed, and that she's going to eventually need to go back over it all again (heck, maybe that is the way).

Does anyone have recommendations for courses, books, articles or anything which would help with the problem-solving stuff? I'd say it's more mathematical, but I don't feel that studying general mathematics would help with the exercises she's being presented with in the books / course. I think it's fair to say that she doesn't have a strong background in IT but does want to learn, so maybe there's some IT-related stuff which would be helpful for her to learn to better understand?

I really want to help her with this, but I'm not entirely sure how. Sorry that this might not be an all-Java question, but hopefully some of the knowledgeable people on here will have some advice.

Thanks for taking the time to read. I hope someone can help :)

(Posting on other account because I want to ask quietly)

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How skill-based university is transforming the future of higher education

A skilled workforce of well qualified and experienced students is essentially a pre-requisite now, where enhanced problem-solving capabilities and hands-on knowledge to do a job to the best of their capabilities will be an added advantage..

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How skill-based university is transforming the future of higher education?

The board results were declared recently, and despite good marks some students seemed far from relieved. The next step for them is to crack competitive examinations and get the perfect combination of course and college of their choice. There are a plethora of options for students today, but the key is to make the right decision at this stage as it will ultimately determine their future. While earlier students preferred theoretically based courses, there has been a mass movement towards courses that lead to employment immediately after the students have finished their education. To prepare students ready for workforce 5.0, we need to give them the right exposure to their chosen field of study, ensuring that they become an asset to the industry immediately after they pass out.

UNDERSTANDING STRENTHS AND WEAKNESSES

To choose the right course, a student needs to understand his/her own strengths and weaknesses. An aptitude and attitude towards their chosen career option helps students to excel in their field. Awareness amongst students must be created to encourage them to identify their aptitude as per various career options. One can easily avail such a test from the multitude of online aptitude tests available and have an insight into the career choices that lie in front of them.

If a student has an interest in Medical Science, then, apart from MBBS they have career options in Allied Health Sciences too where one can choose to be a paramedic, emergency medical technician, laboratory technician, anesthesia technician, physiotherapist, optometrist, pharmacist, nurse, radiographers etc who can become an important member of the team in relevant departments like diagnostics, public health as well as patient care. Through research one can contribute to various projects, clinical trials, advancement in technology to reshape the future of healthcare. Likewise, one can find vast options in engineering, agriculture, manufacturing, and other fields.

Skill integration in higher education is the key step to ensure that the right foundation for students is laid down. As universities provide hands-on training and exposure to industry during the span of the course, students become more confident in handling the work pressure and expectations in a professional setup. With industry on campus, universities in collaboration with industry giants like Dassault, Ashok Leyland, Godrej, Schneider Electric, Yamaha etc provide the students with complete know-how even before the completion of their graduation.

SOFT-SKILLS

Another crucial aspect of learning that a student needs to work upon during their college days is their soft skills. Thus, today’s skill-based universities are supporting students to hone their presentation skills, negotiation skills, empathy skills by thinking about the disadvantaged by working in rural areas and also being able to successfully implement an idea from inception to execution. Developing entrepreneurial skills in students will ensure that they are not just studying to become a small part of workforce, but are willing to go the extra mile and contribute positively to the society and economy.

Here, an understanding of networking will also play a crucial role in the progress a student makes in his career. They will be able to look for job opportunities, collaborate with individuals and companies that can further take them forward in their chosen career and, most importantly, build a reputation for themselves that will boost confidence and lead to personal as well as professional growth in the long run.

In totality, when a student opts for skill-based university, they also learn about product designing, developing it, getting it patented and commercial manufacturing. If an engineering student learns to make an e-rickshaw or design a car, a student pursuing a course in agriculture is able to utilise technology to produce the best yield and work as not just a farmer but an entrepreneur, only then can we truly say that our students are ready to take on the challenges that the future may unfold. And universities will become the ground for them to soar high.

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Crossword puzzles helping solve the problem of Aphasia

CLEARWATER, Fla. — What might look like a room full of people filling out crossword puzzles iss really so much more.

The group that gathered recently in Clearwater truly appreciate words. And they know how hard words are to come by some times.

What You Need To Know

the annual voices of hope for aphasia fundraiser shined a spotlight on the disease that affects so many families. the word play event featured a crossword puzzle competition. member of the tampa bay rays leant their support and showed off their crossword puzzle skills..

Some of the people in the room suffer from aphasia, a disorder where finding the right words is a daily struggle. People like Mark Severini, whose wife Mikhele brought him to the word play event to help raise funds to combat the disease that robs those afflicted with it of the simple art of conversation.

“It’s so encouraging to see to that this disease is out there and it’s becoming more knowledgeable,” Mikhele said. “People are understanding what it is.”

Mark’s struggled with Aphasia for years. He has trouble forming words, but not doing puzzles. They actually help keep his brain sharp, one of the many things that help him cope with his disorder. Many had never heard of aphasia until Hollywood superstar Bruce Willis announced in 2022 that he had the disease, an affliction that affects a part of the brain controlling language. According to the National Aphasia Organization, more than 180,000 people in the United States are diagnosed each year. Part of the goal of this fundraiser is to inform and enlighten.

“Know that everything is still in here, they’re just having difficulty getting it out or understanding what you’re saying,” said Debbie Yones, Voice of Hope for Aphasia Program Director. “So have patience. Have a little bit of compassion.”

In its second year, the Voices of Hope for Aphasia fundraiser drew a packed room. Two of the competitors were Tampa Bay Rays pitchers Pete Fairbanks and Jason Adam. The two leant their support to the cause and showed off their crossword puzzle skills. Rays pitchers routinely do puzzles as part of their pre-game rituals. But this was a different game. This time, the words they were writing down were literally raising money for a great cause. Last year’s event raised more than $120,000, a number they hope to surpass this year.

“I really hope people will come out of this event appreciating and having a little bit more understanding of aphasia because I think part of our mission is to raise awareness,” Debbie said.

That’s what Mikhele Severini wants for her husband. She wants people to understand that even though he might have trouble communicating, he knows what he wants to say, he just can’t get it out sometimes.

“It’s something that nobody would ever dream up but it just hits you and it’s mind numbing for a lot of people,” she said.

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Problem Solving Skills in Java Programming
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COMMENTS

Enhancing Problem-Solving Skills in Java Programming: A Comprehensive Guide
Introduction Problem-solving skills lie at the heart of successful Java programming. In the realm of software development, the ability to dissect complex challenges, design efficient solutions, and implement them through code is paramount. This article delves into the art of honing problem-solving skills within the context of Java programming. By
Problem Solving Skills in Java Programming
While having adequate skills in problem-solving, Java developers can create ample amount of opportunities for themselves, like: They can meet the high demand for Java developers and command high salaries. They can ace software engineering, as problem solving is a critical skill for any software engineer.
Java Exercises
Java Practice Programs. This Java exercise is designed to deepen your understanding and refine your Java coding skills, these programs offer hands-on experience in solving real-world problems, reinforcing key concepts, and mastering Java programming fundamentals.
Master Java Problem-Solving with Easy Tips and Tricks
Java programming, known for its robustness and object-oriented features, is a popular choice among developers. However, becoming proficient in Java requires more than just understanding syntax and features; it demands strong problem-solving skills.
Java Programming: Solving Problems with Software
There are 5 modules in this course. Learn to code in Java and improve your programming and problem-solving skills. You will learn to design algorithms as well as develop and debug programs. Using custom open-source classes, you will write programs that access and transform images, websites, and other types of data.
Problem-Solving. How to Boost Your Ability to Solve ...
There are multiple ways to get better in solving problems. Here are a few recommendations and ways to level-up this essential meta-skill. 8 Steps to Improve Your Problem-Solving Skills as a Rookie Programmer 1. Make sure you understand the problem As something to begin with, it is always good to make sure you really understand the problem.
7 Hacks to become a better Java problem-solver
By Kajal Garg For a Java developer, transforming into a professional programmer is not that tricky and the most expected quality to become one is to detect and solve a problem in minimal time. Let us quickly understand what alterations you must include in your learning schedule to succeed as a Java Developer. Here are seven hacks to become a better java problem solver.
Solve Java
Solve Java coding challenges on HackerRank, a platform with over 23 million developers and ideal for programming interview preparation.
Learn Java Problem Solving
Learn problem solving in Java from our online course and tutorial. You will learn basic math, conditionals and step by step logic building to solve problems easily. 4.6 (3687 reviews) 18 lessons Beginner level. 38.3k Learners.
Java Coding Practice
Explore the Java coding exercises for practicing with commands below. First, read the conditions, scroll down to the Solution box, and type your solution. Then, click Verify (above the Conditions box) to check the correctness of your program. Exercise 1 Exercise 2 Exercise 3. Start task.
5 Ways to Improve Problem-solving Skills for Software Developers
In conclusion, improving problem-solving skills as a software developer requires a combination of practice, learning from others, staying up to date with new technologies, collaborating with peers ...
Taking Your Java Programming Skills to the Next Level, Part 1 ...
By practicing regularly, you'll reinforce your understanding of Java concepts, sharpen your problem-solving skills, and build a robust programming foundation. In conclusion, learning Java ...
Learn to code in Java by Solving Coding Problems
This course is about learning to code in Java by solving coding problems. It will help you build a strong foundation in coding and problem-solving. I will take you through the Java introduction practice challenge from HackerRank and show you how to solve them with detailed explanations. In each section, you will find several coding problems of ...
Mastering Algorithms for Problem Solving in Java
Course Overview. As a developer, mastering the concepts of algorithms and being proficient in implementing them is essential to improving problem-solving skills. This course aims to equip you with an in-depth understanding of algorithms and how they can be utilized for problem solving in Java. Starting with the basics, you'll gain a ...
Technical Interview Practice with Java
About this course. You'll need to pass a technical interview if you want to be hired for a technical role. Don't worry — these interviews are pretty predictable, and the same kinds of problems appear again and again. Even if you don't have a technical interview scheduled just yet, practicing these common problems will help you grow as a ...
Solve a real-world problem using Java
2.1 Increment the hamper number, get a new empty hamper (a list of Unit instances), and set its value to 0. 2.2 This for {} loop will add as many units to the hamper as possible: 2.2.1 Get a random number between zero and the number of remaining units minus 1. 2.2.2 Assume you can't find more units to add.
Java, Java, Java: Object-Oriented Problem Solving
We have designed this third edition of Java, Java, Java to be suitable for a typical Introduction to Computer Science (CS1) course or for a slightly more advanced Java as a Second Language course. This edition retains the "objects first" approach to programming and problem solving that was characteristic of the first two editions. Throughout the text we emphasize careful coverage of Java ...
Java Interview Prep: Top 5 Coding Problems
This article delves into five common Java interview problems, providing both starter code and detailed solutions to enhance your understanding and problem-solving skills. Array Rotation. Problem ...
Java programming Exercises, Practice, Solution
The best way we learn anything is by practice and exercise questions. Here you have the opportunity to practice the Java programming language concepts by solving the exercises starting from basic to more complex exercises. A sample solution is provided for each exercise. It is recommended to do these exercises by yourself first before checking ...
How to Improve Coding Skills in Java
In problem-solving, solid knowledge of data structure plays an important role because the data structure is a key piece of any program. In the same way, knowledge of key programming principles, search and sort algorithms, and other well-known algorithms help us to improve the coding skills in Java.
Java Solved Programs and Problems with Solutions
Discover a comprehensive collection of solved Java programs and problems with step-by-step solutions. Elevate your Java programming skills by exploring practical examples and effective problem-solving techniques. From sorting algorithms to data structures, gain hands-on experience and sharpen your Java expertise. Start solving Java challenges today and level up your programming prowess.
What's the best way to learn problem-solving skills required for
She's gone through most of two books on Java and is working on a course in Udemy. The area she really seems to be struggling in is the problem-solving required in book / course exercises. For example: find all of the prime numbers between two numbers; find all even numbers in a number (e.g. 123456 being 2, 4, 6); extract the first and last ...
Java Programming: Solving Problems with Software
There are 5 modules in this course. Learn to code in Java and improve your programming and problem-solving skills. You will learn to design algorithms as well as develop and debug programs. Using custom open-source classes, you will write programs that access and transform images, websites, and other types of data.
Showcase Problem-Solving Skills in Your Job Search
For each problem identified, outline the solutions you implemented. This should include the steps you took to understand the issue, the options you considered, and the reasoning behind your chosen ...
How skill-based university is transforming the future of higher
Another crucial aspect of learning that a student needs to work upon during their college days is their soft skills. Thus, today's skill-based universities are supporting students to hone their presentation skills, negotiation skills, empathy skills by thinking about the disadvantaged by working in rural areas and also being able to successfully implement an idea from inception to execution.
In our rush to adopt AI, let's be sure to teach young people how to
Learning problem-solving skills. Going through normal challenges while working as a teenager is how children and young adults learn problem-solving skills, such as how to figure things out that ...
Crossword puzzles helping solve the problem of Aphasia
Member of the Tampa Bay Rays leant their support and showed off their crossword puzzle skills. Some of the people in the room suffer from aphasia, a disorder where finding the right words is a ...