Handeling listner and window events in another class

Question

All if i have my one class that defines a JPanel how i put my listner events into another class.
so if i had
     import javax.swing.*;
     class MyFrame extends JFrame {
       public MyFrame() {
          setTitle("My Empty Frame");
          setSize(300,200); // default size is 0,0
          setLocation(10,200); // default is 0,0 (top left corner)
       public static void main(String[] args) {
         JFrame f = new MyFrame();
         f.show();
     }And then in a class WindowEvents.class i wanted to have all of the actions for any buttons
etc. How do i interface that with the main JPanel or JFrame

Answer 1

I would make another class, for instance if you were doing an ActionListener event, you'd have a seperate class such as,
public class ButtonHandler implements ActionListener {
private YourPanelClass view;
public ButtonHandler(YourPanelClass view) {
        this.view = view;
public void actionPerformed(ActionEvent e) {
//event handling code
view.updateGUI();
}Then in your main frame class, you'd want an updateGUI(); method which would perform the actions required and to add the event to your button you'd do something like this:
ImageIcon upIcon = new ImageIcon("navigationIcons/Up24.gif", "Up Button");
        JButton upBtn = new JButton(upIcon);
        upBtn.setToolTipText("Up");
        UpdateButtonHandler ubh = new UpdateButtonHandler(this);
        upBtn.setActionCommand("bob");
        upBtn.addActionListener(ubh);I'm actually having a simular problem to you, where as I have 1 class for my main frame, one class for my button panel with the buttons on and 1 class for my graphics cpt which im moving about via pressing the buttons. Then another class for my actionListener event, im finding it hard to get the event to work correctly because the updateGUI(); method theoretically needs to be placed inside my button panel class, but if I do that I can't seem to update the graphics cpt properly to actually move it, unless I do it in the main frame class which then means I can't have a seperate class for my button panel. Anyone got any ideas on a solution?