Java menus (radio buttons) and panels

titanium_geek · 12-17-2003, 06:58 PM

Allright, I'm just gonna jump into this head first, so here goes...

HOW DO I DO RADIO BUTTONS? I know how to do them so that they just turn up, (like I did with the other menu items, normal ones) like this:

Code:

	JMenu semnu = new JMenu("Settings");
		JRadioButtonMenuItem sob;
		ButtonGroup crowd = new ButtonGroup();
		semnu.add(sob = new JRadioButtonMenuItem("easy", true));
		crowd.add(sob);
		semnu.add(sob = new JRadioButtonMenuItem("medium"));
		crowd.add(sob);
		semnu.add(sob = new JRadioButtonMenuItem("hard"));
		crowd.add(sob);
		semnu.addSeparator();

the problem is that I moved my normal menu items out of the method so I could do action listening easier (read: so I could do it). The problem? I get an error when I move ^ that stuff up out of the method.
I mean, I declare the menu items before the method, then add them in the method. Help, Please?

allright: another problem (a quickie)
I have a help menu, that when clicked, pops up a new JFrame and tells the user what to do. I have a button "OK" to click when done, but I don't want

Code:

System.exit(0)

, do I? that would make the program quit. How do I close a JFrame, without closing the program?

thanks people.

titanium_geek

nephilim · 12-19-2003, 03:06 AM

check out http://java.sun.com/docs/books/tutor...ml#radiobutton for questions on radio buttons.

You talk about action listeners, but I don't see you declaring one in the code that you posted. You should have crowd.addActionListener(your_action_listener) or something like that. Maybe you should post some more of your code to clarify the situation.

To close a JFrame, use the dispose() method.

name_of_JFrame.dispose()

titanium_geek · 12-19-2003, 05:15 AM

thankyou.

umm.. I declare my action listeners separately, and do the action event stuff separately. Thanks though, that really cleared things up for me.

thanks for the link also.

titanium_geek

nephilim · 12-19-2003, 09:32 AM

No problem. If you have specific problems, don't hesitate to ask for advise.

titanium_geek · 12-22-2003, 06:00 AM

These posts were very helpful guys...
thanks.

my problem now is to actually get the progaming doing something useful(!)

titanium_geek

german · 01-07-2004, 10:43 AM

To close a JFrame or JDialog, JWindow etc. without exiting the program call it's dispose() method. If you want it to persist so you can hide it temporarily, call setVisible(false) then when you want to redisplay it call setVisible(true).

HTH

B.

edit:

oops, nephilim beat me to it, missed that post... sorry for the redundant post

titanium_geek · 01-07-2004, 11:13 AM

thanks german. the set visible false thing could be useful.

titanium_geek