Moving ActionListener code to another class

Question

Hi, I got a simple GUI program like the following:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class GUI extends JFrame implements ActionListener
private JLabel oneLabel;
private JButton hitButton;
public GUI()
Container c = this.getContentPane();
c.setLayout(new FlowLayout());
setLocation(200,20);
oneLabel = new JLabel("");
hitButton = new JButton("Hit Me");
JPanel mainPanel = new JPanel(new GridLayout(2,1));
mainPanel.add(oneLabel);
mainPanel.add(hitButton);
c.add(mainPanel);
this.setSize(100,100);
setVisible(true);
// Action Listeners
hitButton.addActionListener(this);
public void actionPerformed(ActionEvent event)
try
if (event.getSource() == hitButton)
oneLabel.setText("You hit me");
catch(Exception e)
e.printStackTrace();
Then I got a main class that is used to access the GUI class posted above:
public class Main
public static void main (String[]args)
try
GUI G = new GUI();
catch(Exception evt)
evt.printStackTrace();
What I am trying to do is move the whole actionPerformed method from the GUI class to the Main class and make it work as it was in the GUI class so that the GUI class is only responsible for generating the visual interface. Also do I need to place the addActionListener to the Main class as well? Can anyone tell me how to proceed with this?
Thanks for your inputs.

Answer 1

I have tried editing the Main class like:
import javax.swing.*;
import java.awt.*;
public class Main implements ActionListener <----
COMPILING ERROR
public static void main (String[]args)
try
GUI G = new GUI();
catch(Exception evt)
evt.printStackTrace();
hitButton.addActionListener(G);
public void actionPerformed(ActionEvent event)
try
if (event.getSource() == hitButton)
oneLabel.setText("You hit me");
catch(Exception e)
e.printStackTrace();
It gives me a cannot find symbol error however.
Please, I need to get this done by tonight.If you want ro Refer to G outside the try-block, you have to declare it out side
         GUI G = null;
       try{
            G = new GUI();     
  catch(Exception evt)
evt.printStackTrace();
if (G != null)
   hitButton.addActionListener(G);You should read the turorial about visibilty and some other chapters.
http://java.sun.com/docs/books/tutorial/reallybigindex.html
Greetings Michael