java - How to stop an actionListener from executing its code if the user chooses no on a confirm dialog box? -

i have actionlistener set on button. if user clicks it adds 10 progress bar. want allow user cancel button press , prevent code within actionlistener executing. i.e. want program disregard users click if choose no on confirm dialog box.

is try/catch exception way go here?

thanks.

btnfightcrime.addactionlistener(new actionlistener(){                 @override                 public void actionperformed(actionevent arg0) {             if (joptionpane.showconfirmdialog(null, "this action cost 5 energy points, , you'll gain 5 action points.", "proceed?",                     joptionpane.yes_no_option) == joptionpane.no_option) {                 // yes option             } else if (joptionpane.yes_no_option==joptionpane.yes_option) {              btnfightcrime.addactionlistener(new actionlistener(){                    @override                 public void actionperformed(actionevent arg0) {                      crimes.randomcrime();                     fightcrime(iactionbar);                     random r = new random();                     int delay = 0;                     //delay * 1000 because format timers milliseconds                     timer = new timer ((delay*0), new actionlistener(){                         @override                         public void actionperformed(actionevent arg0){                             btnfightcrime.setvisible(true);                             btnignore.setvisible(true);                             lblvillaincrime.setvisible(false);                             lblherocrime.setvisible(true);                              frame.validate();                             timer.stop();                         }        });                     timer.start();                     btnfightcrime.setvisible(false);                     btnignore.setvisible(false);                     lblherocrime.setvisible(false);                     frame.validate();                     }             });             }                 }             });   if (joptionpane.showconfirmdialog(null, "this action cost 5 energy points, , you'll gain 5 action points.", "proceed?",                     joptionpane.yes_no_option) == joptionpane.yes_option) {                 btnfightcrime.addactionlistener(new actionlistener(){                        @override                     public void actionperformed(actionevent arg0) {                          crimes.randomcrime();                         fightcrime(iactionbar);                         random r = new random();                         int delay = 0;                         //delay * 1000 because format timers milliseconds                         timer = new timer ((delay*0), new actionlistener(){                             @override                             public void actionperformed(actionevent arg0){                                 btnfightcrime.setvisible(true);                                 btnignore.setvisible(true);                                 lblvillaincrime.setvisible(false);                                 lblherocrime.setvisible(true);                                  frame.validate();                                 timer.stop();                             }            });                         timer.start();                         btnfightcrime.setvisible(false);                         btnignore.setvisible(false);                         lblherocrime.setvisible(false);                         frame.validate();                         }                 });             } else if (joptionpane.yes_no_option==joptionpane.no_option) {               } 

simply use if statement , check return state of confirmation dialog...

int result = joptionpane.showconfirmdialog(this, "are sure want destory world?", "destory world", joptionpane.yes_option); if (result == joptionpane.yes_option) {     // blow } 

of course, use same technique, use flag, if confirmation process separate update process, becomes more difficult

based on updated code

i'm going take stab in dark , "guess" mean...

btnfightcrime.addactionlistener(new actionlistener() {     @override     public void actionperformed(actionevent arg0) {         if (joptionpane.showconfirmdialog(null, "this action cost 5 energy points, , you'll gain 5 action points.", "proceed?",                         joptionpane.yes_no_option) == joptionpane.yes_option) {             crimes.randomcrime();             fightcrime(iactionbar);             random r = new random();             int delay = 0;             //delay * 1000 because format timers milliseconds             timer = new timer((delay * 0), new actionlistener() {                 @override                 public void actionperformed(actionevent arg0) {                     btnfightcrime.setvisible(true);                     btnignore.setvisible(true);                     lblvillaincrime.setvisible(false);                     lblherocrime.setvisible(true);                      frame.validate();                     timer.stop();                 }             });             timer.start();             btnfightcrime.setvisible(false);             btnignore.setvisible(false);             lblherocrime.setvisible(false);             frame.validate();          }     } }; 

there no point in doing } else if (joptionpane.yes_no_option==joptionpane.yes_option) {, (most likely) false (or @ least, unreliable).

adding actionlistener inside actionlistener same button doesn't make sense. ask user, "do wan this?", if answer "yes", do, otherwise, don't, they've clicked button...