Java Programming on Linux: Compile and Run a Simple Program

Java programs can be compiled and run from the Linux command line using the JDK tools javac and java.

Check Java is installed

java -version
javac -version

If javac is missing, install a JDK package rather than only a runtime package.

Compile a Java file

javac Hello.java

This creates a compiled Hello.class file.

Run the program

java Hello

Use the class name without the .class extension when running it.