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Java — Hello World

The classic hello-world in Java — a public class with the standard main method — for testing highlighters, javac, and Java parsers.

Preview — first 7 linesjava
// The classic first program, in Java.
public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, world!");
    }
}

Specifications

Language
Java
Kind
hello-world
Lines
6
Encoding
UTF-8
Line Endings
LF

What is a .java file?

Java (.java) is a plain-text source file for the Java programming language — a statically typed, class-based, object-oriented language that compiles to JVM bytecode. It is widely used for enterprise back-ends, Android apps, and large systems, and emphasises explicit types and classes.

How to use this file

Use an example .java file to test syntax highlighters, the javac compiler, linters and formatters (Checkstyle, google-java-format), and parser or language-detection tooling.

Generated by generation/code_samples.py. Free for any use, no attribution required — license.