1 import sun.security.util.SecurityConstants; 2 import java.security.Permission; 3 4 public class CustomSecurityManager extends SecurityManager { 5 @Override checkPermission(Permission perm)6 public void checkPermission(Permission perm) { 7 if (perm.implies(SecurityConstants.AWT.TOPLEVEL_WINDOW_PERMISSION)) { 8 throw new SecurityException(); 9 } 10 } 11 } 12