Re: Create JButtons from array

From:
none <""arthur\"@(none)">
Newsgroups:
comp.lang.java.programmer
Date:
Sat, 02 Feb 2008 14:25:34 -0900
Message-ID:
<47a4fc25@news.acsalaska.net>
You are instantiating one set of buttons when you create the array, and
overwriting them with another set in the loop. The, you test for the
wrong button in the callback.

Arthur

Brian wrote:

Hi all

I'm writing a small program with a lot of buttons. To make it a little
easier to write the code I've tried to create the JButtons from an
array.

I don't work.

I don't get response from the ActionListener

Any ideas?

/Brian

Simple example:
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;

import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.border.EtchedBorder;

public class ButtonPanel extends JPanel {
private Controller controller = new Controller();
private JButton btnOne, btnTwo, btnThree, btnABC, btnFour, btnFive,
btnSix, btnExtra1, btnSeven, btnEight, btnNine, btnExtra2, btnAsterix,
btnZero, btnHash, btnSearch;
private JButton[] buttons = { btnOne, btnTwo, btnThree, btnABC,
btnFour, btnFive, btnSix, btnExtra1, btnSeven, btnEight,
btnNine, btnExtra2, btnAsterix, btnZero, btnHash, btnSearch };
private String[] buttonTxt = { "1", "2", "3", "ABC", "4", "5", "6",
"Extra1", "7", "8", "9", "Extra2", "*", "0", "#", "SHg" };

public ButtonPanel() {
for (int i = 0; i < buttons.length; i++) {
    buttons[i] = new JButton(buttonTxt[i]);
    buttons[i].setSize(80, 80);
    buttons[i].addActionListener(controller);
    this.add(buttons[i]);
    }
}

private class Controller implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == btnOne) {
            System.out.println("test OK");
        }
    }
}

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