Java 8 coding practice online

Java 8 coding practice online

Java is an excellent programming language to learn, and practicing with online resources can help you improve your skills. Here are some popular websites and platforms where you can find Java 8 coding practice exercises:

Example problem: "Reverse Integer" - Given an integer which is greater than the greatest integer represented by binary with N bits (N > 30), reverse bits of this integer.

Example problem: "Java 8 Challenges" - This challenge covers various topics such as lambda expressions, method references, functional programming, and more.

Example problem: "Sum of Digits" - Given a non-negative integer num, return the sum of its digits.

Example problem: "Java 8 Katas" - This challenge covers various topics such as lambda expressions, method references, functional programming, and more.

Example problem: "Java 8 Challenges" - This challenge covers various topics such as lambda expressions, method references, functional programming, and more.

Example problem: "Java 8 Practice" - This challenge covers various topics such as lambda expressions, method references, functional programming, and more.

Remember to choose the platform that best fits your learning style and goals. Happy coding!

How to debug Java 8 stream?

Debugging Java 8 Streams! This can be a challenging but fascinating task. Here are some tips and strategies to help you tame the Stream beast:

Understand the basics: Before diving into debugging, make sure you have a solid grasp of Java 8 Streams and their various operations (map, filter, reduce, collect, etc.). Understand the differences between streams and collections.

Use a Stream-specific IDE or tool: Some Integrated Development Environments (IDEs) like Eclipse or IntelliJ IDEA provide built-in support for debugging Java 8 Streams. These tools can help you visualize the pipeline of your stream and identify potential issues more easily.

Print intermediate results: When working with complex streams, it's helpful to print intermediate results to see how the processing is happening. You can do this using the forEach method or a custom logging mechanism.

Use lambdas as debuggers: Sometimes, inserting a lambda expression in your stream pipeline can help you understand what's going on. For example, if you're working with a map operation, you can insert a lambda that logs the current value being processed:

stream.map(x -> {
System.out.println("Processing: " + x);
return x;
}).collect(Collectors.toList());

Check for null pointers: One common issue when working with streams is dealing with null pointer exceptions. Make sure to check for null values before processing them, especially in filter operations.

Use a debugger or print statements: When you encounter unexpected behavior, use the built-in debugger (e.g., Eclipse's Debugger) or insert print statements to inspect the state of your stream at different points.

Simplify and isolate issues: If you're experiencing an issue with a complex stream pipeline, try breaking it down into smaller, more manageable pieces. This will help you identify where the problem is occurring.

Understand the difference between parallel streams and serial streams: Java 8 Streams allows for both parallel and serial processing. Be aware of when your code is running in parallel mode (default) or not, as this can affect the behavior of certain operations.

Test with sample data: Providing specific input data to test your stream pipeline can help you identify issues related to edge cases or unexpected values.

Consult Java 8 Stream documentation and tutorials: If you're struggling with a particular aspect of Java 8 Streams, consult the official documentation (Java API documentation) and online tutorials. There are many excellent resources available that can help you understand how to work effectively with streams.

By following these guidelines, you should be well-equipped to tackle the challenges of debugging Java 8 Streams. Happy coding!