Java tutorial
import java.security.AccessControlContext; import java.security.AccessController; public class Main extends SecurityManager { public static void main(String[] args) { AccessControlContext con = AccessController.getContext(); System.setProperty("java.security.policy", "file:/C:/java.policy"); SecurityManager sm = new Main(); System.setSecurityManager(sm); sm.checkRead("test.txt", con); System.out.println("Allowed!"); } }