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Quick Answer

Our free online Java editor lets you write, compile, and run Java code directly in your browser. Supports Java 17+ features including Collections, Streams, and Lambda expressions with no JDK installation required.

How It Works

1

Write your Java code with a main method

2

Click Run to compile and execute

3

View output and compile errors in console

4

Share your code via URL

Key Facts

  • Compile and run Java code in your browser
  • Java 17+ with modern language features
  • Collections, Streams, and Lambda support
  • Full object-oriented programming support
  • No JDK installation required
  • Syntax highlighting and compile errors

Frequently Asked Questions

Which Java version is supported?

We support Java 17+ with modern features like records, pattern matching, text blocks, and the full java.util package.

Can I use multiple classes?

Yes, you can define multiple classes in the same file. The class containing the main method will be executed.

Are external libraries available?

The Java standard library is available. For external dependencies like Maven packages, use a local IDE.

Can I test Streams and Collections?

Yes, full support for java.util.stream, Collections framework, Optional, and functional interfaces.