Terminates the running program and the current JVM : System Class « Development « Java Tutorial

1. Java Tutorial
2. Development
3. System Class

public static void exit (int status)

1. You normally pass 0 to indicate that a normal exit.
2. A nonzero indicate an error.

public class MainClass {

  public static void main(String[] a) {
    System.exit(0);
  }

}