Re: Create JButtons from array

Brian wrote:


See the notes in you code (modified) below. If you are going to post
code, please post an SSCCE (see http://www.physci.org/codes/sscce.html).
  It would be really nice if you could develop a neat indentation style.

This should get you going, post back if you have further questions.

//
// it is just easier to include the whole package rather than having all
// those statements
//
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class ButtonPanel extends JPanel {
private Controller controller = new Controller();
//
// these are redundant because you reassign them in the loop
//
// private JButton btnOne, btnTwo, btnThree, btnABC, btnFour, btnFive,
// btnSix, btnExtra1, btnSeven, btnEight, btnNine, btnExtra2, btnAsterix,
// btnZero, btnHash, btnSearch;
//
// these are also a problem
// 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" };
//
// just create an array of JButtons
//
JButton[] buttons = new JButton[buttonTxt.length];

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]);
    }
}

//
// rather than create another class that implements ActionListener you can
// have your ButtonPanel class implement ActionListener
// to do that just change the first line of the class to;
//
// public class ButtonPanel extends JPanel implements ActionListener {
//
// and add an actionPerformed() method to the class
//
private class Controller implements ActionListener {
    public void actionPerformed(ActionEvent e) {
         /*
        if (e.getSource() == btnOne) {
            System.out.println("test OK");
        }
         */
         // get the action command which is the text of the button unless
         // otherwise set and test that for the one you want, that way
you don't
         // have to have references to all the buttons here
         String actionCommand = e.getActionCommand();
         if (actionCommand.equals("1"))
             System.out.println("test OK");
         else
             System.out.println(actionCommand);
    }
}

public static void main(String[] args) {
     EventQueue.invokeLater(new Runnable() {
         public void run() {
             JFrame f = new JFrame();
             f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
             f.add(new ButtonPanel());
             f.pack();
             f.setVisible(true);
         }
     });
}

}

--

Knute Johnson
email s/nospam/knute/

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