A Simple Java Application

The following application prints "Hello World!" to the console.

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

The source code.

Important Note: the name of the program must have the same name as the public class followed by a .java extension, in this case HelloWorldApp.java.

To compile this program, type:

	javac HelloWorldApp.java

To run with the interpreter, type:

	java HelloWorldApp

The program should print out the message "Hello World!" to the console.

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