Re: buttons and troubles...

From:

"Daniel Pitts" <googlegroupie@coloraura.com>

Newsgroups:

comp.lang.java.programmer

Date:

5 Nov 2006 14:28:55 -0800

Message-ID:

<1162765734.977780.276420@i42g2000cwa.googlegroups.com>

man4*.* wrote:

I've got 9 buttons that are presented with one icon, and when I press that
button I want to change it, but
I've complicated a little bit... (hope, you'll understand what I need, if
not, I'll send whole code)

button initialization:

JButton[] button = new JButton[9];
{for ( int i = 0; i < 9; i++)
  button[i] = new JButton(paint[0]);}

putted 9 ActionListeners:

Container cp = getContentPane();
  cp.setLayout(new FlowLayout());
  for ( int i = 0; i < 9; i++)
   cp.add(button[i]);
  for ( int i = 0; i < 9; i++)
   button[i].addActionListener(new AL());

AL is a class that implements ActionListener,
also I've got 2 icons:

static Icon[] paint = {
  new ImageIcon(path + "icon1.gif"),
  new ImageIcon(path + "icon2.gif")};

i want each time I press a button to change from icon1 to icon2.
in actionPerformed method I followed yours advices and put
Object buttonSource = e.getSource();
but since my buttons are Array obj. I can't say:
buttonSource.setIcon(paint[1]);

Actually, you can, but you need to cast buttonSource to a JButton.

JButton buttonSource = (JButton)e.getSource();
buttonSource.setIcon(paint[1]);

That should work. e.getSource() will return the Object that created
the event, in this case *one* of the 9 buttons. e.getSource() return
type is Object, because the source "could" be anything, but in this
case you know it is a JButton, and just need to cast. To be on the
safe side, you probably should check instanceof JButton, although this
isn't something I do often, but I'm not usually a GUI programmer.

Well, good luck.
-Daniel.