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Java learning path

Object-oriented, strongly typed language of the JVM. Follow the lessons in order — each one lists what you should know first.

Beginner

  1. 1IntroductionTutorialJava 21 First Console App: Structure, Compile, RunLearn the smallest useful Java console program: how source code becomes bytecode, how `public class Main` and `main` work, and how to print, parse text with `Scanner`, and read command-line arguments.

Intermediate

  1. 1IntermediateTutorialJava Exceptions for Validation and Safe CleanupLearn how to model validation failures with exceptions, preserve debugging causes, and close resources safely with try-with-resources.

Advanced

  1. 1AdvancedTutorialJava Virtual Threads with Safe Shared StateLearn how to run many Java tasks with ExecutorService and virtual threads, collect results with Future, and protect shared state with atomic classes or locks.