// Multilistener.java
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.event.ActionEvent;

public class MultiListener extends JApplet 
                           implements ActionListener {

    JTextArea topTextArea;
    JTextArea bottomTextArea;
    JButton button1, button2;

    public void init() {
        JLabel l = null;
		Container container = getContentPane();
        GridBagLayout gridbag = new GridBagLayout();
        GridBagConstraints c = new GridBagConstraints();
        container.setLayout(gridbag);

        c.fill = GridBagConstraints.BOTH;
        c.gridwidth = GridBagConstraints.REMAINDER;
        l = new JLabel("What MultiListener hears:");
        gridbag.setConstraints(l, c);
        container.add(l);

        c.weighty = 1.0;
        topTextArea = new JTextArea(5, 20);
        topTextArea.setEditable(false);
		JScrollPane topScroller = new JScrollPane(topTextArea);
        gridbag.setConstraints(topScroller, c);
        container.add(topScroller);

        c.weightx = 0.0;
        c.weighty = 0.0;
        l = new JLabel("What Eavesdropper hears:");
        gridbag.setConstraints(l, c);
        container.add(l);

        c.weighty = 1.0;
        bottomTextArea = new JTextArea(5, 20);
        bottomTextArea.setEditable(false);
		JScrollPane bottomScroller = new JScrollPane(bottomTextArea);
        gridbag.setConstraints(bottomScroller, c);
        container.add(bottomScroller);

        c.weightx = 1.0;
        c.weighty = 0.0;
        c.gridwidth = 1;
        c.insets = new Insets(10, 10, 0, 10);
        button1 = new JButton("Blah blah blah");
        gridbag.setConstraints(button1, c);
        container.add(button1);

        c.gridwidth = GridBagConstraints.REMAINDER;
        button2 = new JButton("You don't say!");
        gridbag.setConstraints(button2, c);
        container.add(button2);

        button1.addActionListener(this);
        button2.addActionListener(this);

        button2.addActionListener(new Eavesdropper(bottomTextArea));
    }

    public void actionPerformed(ActionEvent e) {
        topTextArea.append(e.getActionCommand() + "\n");
    }
}

class Eavesdropper implements ActionListener {
    JTextArea myTextArea;
    public Eavesdropper(JTextArea ta) {
        myTextArea = ta;
    }

    public void actionPerformed(ActionEvent e) {
        myTextArea.append(e.getActionCommand() + "\n");
    }
}