Question

can some please what im doing wrong with my action listener.. i have no idea how an action listener work a little help will be appreciated. thanks in advance.

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class PushCounter{
public static void main(String[] args){
JFrame frame =new JFrame("Calculator");
frame.setVisible(true);
frame.setSize(300,300);
frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE );
// THE BUTTON SETUP
JButton button = new JButton("CLICK ON ME");
button.setBorderPainted(true);
button.addActionListener(new buttonListener());
//sets up label
JLabel label= new JLabel("display is on wait:");
// sets up the panel
JPanel panel = new JPanel();
panel.setBackground(Color.cyan);
//completing my frame
panel.add(button);
panel.add(label);
frame.add(panel);
}
public class buttonListener implements ActionListener{
public void actionPerformed(ActionEvent e){
if(button.get.source())
panel.setBackground(Color.black);

}
}
}

Answer 1

Hmmm... not sure off the top of my head. What error did it give,or worse, did it not give an error?

Answer 2

i have 3 red xs

Answer 3

first on:button.addActionListener(instanceOfbutton);
second on:if(button.get.source())
third on: panel.setBackground(Color.black);

Answer 4

The ones on public class buttonListener implements ActionListener{ are scope issues. You drfined those in the main, not the listener.

Answer 5

sorry i dont get it

Answer 6

I think u r getting the First error because u have declared "button" variable only in Main method , But u r using it in the listener, add "private JButton button;" and "private JPanel panel;" at the top of ur code

Answer 7

secondlt make a constructor and add listener in that method, i think u get problems when u add listener in the main method..........
remove button.addActionListener() line from the main code and
Add
Public PushCounter() {
button.button.addActionListener(this) ;
}
in ur code, that should do it.

Answer 8

k let me try it

Answer 9

Also add "new PushCounter();" line in ur main code, to call the constructor

Answer 10

wow awsome..

Answer 11

did it work?

Answer 12

yeap

Answer 13

Great

Answer 14

thank you very much

Answer 15

no probs