Java: Adding ActionListeners to graphical objects

Question

I got a whole bunch of buttons, is there a way of adding actionListeners to all of them without going button.addActionListeners(this) for all of them? it makes the code looks so messy.

`it makes the code looks so messy.` sorry really ???, don't extend class or implements whatever — mKorbel, Oct 28 '12 at 19:14

score 3 · Answer 1 · answered Oct 28 '12 at 17:27

3

If you want common behavior to all your buttons you need to make them extends an abstract class where you defined the common code. So define your own abstract MyButtonClass with its own add listener method.

answered Oct 28 '12 at 17:27

Alain BUFERNE

2,016
3
26
37

score 3 · Answer 2 · answered Oct 28 '12 at 17:28

3

No, there is not. But if all the buttons share the same action listener (which is quite strange), maybe they should be stored in an array or collection. You could then do:

for (JButton button : allButtons) {
    button.addActionListener(this);
}

answered Oct 28 '12 at 17:28

JB Nizet

678,734
91
1,224
1,255

score 3 · Answer 3 · answered Oct 28 '12 at 17:31

3

If all the buttons are on a single container you could register a single ActionListener like this:

for (Component c: container.getComponents()) {
   if (c instanceof JButton) {
      ((JButton)c).addActionListener(this);
   }
}

answered Oct 28 '12 at 17:31

Reimeus

158,255
15
216
276

Java: Adding ActionListeners to graphical objects

3 Answers3