How to update status bar?

Question

Sorry if this question is too simple for most. I have only been starting to learn Java for about a week from scratch with almost no programming experience.
I have created a GUI application and for the sake of it there are three .class files.
GuiFrame - the main application Frame
GuiMenuBar - a happy little MenuBar that sits at border.NORTH of GuiFrame.
GuiStatusBar - a JLabel that I intend to use to display messages to the user at border.SOUTH of GuiFrame.
So far this all works quite happily. As my next exercise I wanted to send messages to the StatusBar when I select a menuitem. For examples I click on Save - the StatusBar tells me "You have clicked on save".
I don't know how to do it when the bit of GUI I am trying to send a message to is part of a different class ?
Any pointers to particularly good and simple examples ? Please.
Douglas.

Answer 1

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class Example extends JFrame implements ActionListener{
    JLabel lblStatus = new JLabel("");
    JMenuItem mniSave = null;
    public Example(){
        mnuFile = new JMenu();
        mniSave.addActionListener(this);
    public void actionPerformed(ActionEvent e){
        if (e.getSource() == mniSave)
            lblStatus.setText("You have clicked on Save");
        else if (e.getSource() == btnExit)
            System.exit(0);
}