Compile & Run in Java
From the Java cheat sheet · Getting Started · verified Jul 2026
Compile & Run
Compile to bytecode, run, or launch a single file directly.
java
// Quick Reference
javac Main.java // compile -> Main.class
java Main // run the class (no .class extension)
java Main.java // compile + run a single file in one step💡 java Main runs a compiled class; java Main.java compiles and runs in one shot.
⚡ jshell is a built-in REPL for testing snippets without a full program.
📌 Bytecode (.class) runs on any JVM - "write once, run anywhere".
🟢 Use Javadoc /** */ comments to document public APIs for tooling.
clicompile
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