Java Hello World

To create a new Java class or type, follow these steps: In the Project window, right-click a Java file or folder, and select New > Java Class . Alternatively, select a Java file or folder in the Project window, or click in a Java file in the Code Editor. Then select File > New > Java Class.

In Java, programs are not compiled into executable files; they are compiled into bytecode (as discussed earlier), which the JVM (Java Virtual Machine) then executes at runtime . Java source code is compiled into bytecode when we use the javac compiler. The bytecode gets saved on the disk with the file extension .