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• 花匠小妙招
• 2026-08-06 07:08

Java Tutorial

Java is one of the world's most widely used programming languages.

Java is free to use, and runs on all platforms.

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Get certified with our Java exam, includes a professionally curated study kit to guide you from beginner to exam-ready.

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Examples in Each Chapter

Our "Try it Yourself" editor makes it easy to learn Java. You can edit Java code and view the result in your browser.

Exercises

Many chapters in this tutorial end with an exercise where you can check your level of knowledge.

Exercise?What is this?
Test your skills by answering a few questions about the topics of this page

Drag and drop the correct method to print Hello World in Java.

System.out. ("Hello World");

prntl

println

echo

printline

See all Java Exercises

What You'll Learn

This tutorial will guide you step by step, with examples and exercises along the way:

Java syntax and basic structure Variables, data types, and operators Conditions and loops Methods and parameters Arrays and strings Object-oriented programming Classes, objects, inheritance, and polymorphism Exception handling File handling Collections and useful built-in classes

Java Quiz

Check your understanding with a short quiz and see how well you know Java.

Start Java Quiz

Learn by Examples

Learn by examples! This tutorial supplements all explanations with clarifying examples.

See All Java Examples

Track Your Progress

Note

This is an optional feature. You can study at W3Schools without creating an account.

Java Reference

You will also find complete keyword and method references:

Java Certification

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