Statically typed, runs on the JVM

Java Compiler Online — Run Java Code in Your Browser

Java compiles to bytecode that runs on the JVM — "write once, run anywhere." It's verbose compared to newer languages, but that explicitness is exactly why it's stayed the backbone of enterprise backend systems for decades.

public class Main {
    public static void main(String[] args) {
        System.out.println("Hello, world!");
    }
}

What people use Java here for

• Practicing Java syntax and OOP concepts for a class or interview prep
• Testing a small class or algorithm without a full Maven/Gradle project
• Checking how a specific Java standard-library method actually behaves

No installs, no signup

Code you write here runs on a real, self-hosted Judge0 execution backend — actual Java compiler or interpreter output, not a simulation. Your code goes through a real javac compile step before it runs, so compile errors show up exactly as they would locally, not just runtime ones. See the full list of supported languages or read more about how AnyCompiler works.