Java tutorial
public class Main extends SecurityManager { // checkExit needs to be overriden. @Override public void checkExit(int status) { throw new SecurityException("Not allowed."); } public static void main(String[] args) { System.setProperty("java.security.policy", "file:/C:/java.policy"); SecurityManager sm = new Main(); System.setSecurityManager(sm); // perform the check sm.checkExit(5); System.out.println("Allowed!"); } }