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Thread: ActionListener Help?

  1. #1
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    Default ActionListener Help?

    I am trying to add the ActionListener coding to my code, but i can't seem to figure out the rest of the code, am i missing something, i'll provide my code and my attempted ActionListener coding that i tried implementing in there, any help would be nice, thanks.

    import java.awt.event.*;
    import java.awt.*;
    import javax.swing.*;
     
    public class Keypad extends JFrame implements ActionListener {
    private static final int i = 1;
     
    public Keypad() {
     
    JPanel p1 = new JPanel();
    p1.setLayout(new GridLayout(4, 3, 5, 5));
     
    //Adding Buttons
    for (int i = 1; i<= 9; i++) {
    p1.add (new Button("" + i));
    }
     
    p1.add(new JButton("*"));
    p1.add(new JButton("" + 0));
    p1.add(new JButton("#"));
     
     
    JPanel p2 = new JPanel(new BorderLayout());
    p2.add(new JTextField(""),
    BorderLayout.NORTH);
    p2.add(p1, BorderLayout.CENTER);
     
    add(p2, BorderLayout.WEST);
    add(new JButton("Clear"),
    BorderLayout.CENTER);
    }
     
                  //Main Method
    public static void main(String[] args){
    Keypad frame = new Keypad();
    frame.setTitle("Phone");
    frame.setSize(300, 350);
    frame.setLocationRelativeTo(null);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setVisible(true);
    }
    }

    Here is my attempted ActionListener Coding: (it doesn't work though)
    String[] btnLabels = "1,2,3,4,5,6,7,8,9,0,#,* ".split(","); {
    	for( int i = 1; i< btnLabels.length; i++ );
    	JButton btn = new JButton( btnLabels[i] );
    	btn.addActionListener( this );
    	add( btn );
    	}
     
    	public void actionPerformed( ActionEvent evt ) {
    	if( evt.getSource() instanceof JButton ) {
    	JButton btn = (JButton)evt.getSource();
    	AbstractButton label = null;
    	if( btn.getText().equalsIgnoreCase("clear"))
    	label.setText("");
    	}
    	}
    Last edited by helloworld922; March 30th, 2010 at 08:22 PM.


  2. #2
    Administrator copeg's Avatar
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    Default Re: ActionListener Help?

    What exactly is the problem? You must add the listener to whichever component you want to respond, for example
    for (int i = 1; i<= 9; i++) {
    JButton button = new JButton("" + i);
    button.addActionListener(this);
    p1.add (button);
    }

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