import javax.swing.*;          //This is the final package name.
//import com.sun.java.swing.*; //Used by JDK 1.2 Beta 4 and all
			       //Swing releases before Swing 1.1 Beta 3.
import java.awt.*;
import java.awt.event.*;

public class HelloSwing extends JFrame implements ActionListener {
    private JLabel label;
    private static String labelPrefix = "Number of button clicks: ";
    private int numClicks = 0;

    public HelloSwing() {
        super("HelloSwing");

        //XXX: In 1.0.2 only, must use FixedJButton instead of JButton
	//XXX: if you want mnemonics to work.
        //XXX: See ui/swing/workaround.html for details.
        JButton button = new JButton("I'm a Swing button!");
        button.setMnemonic('i');
        button.addActionListener(this);
	button.getAccessibleContext().setAccessibleDescription(
		"When you click this button, the label is updated "
	      + "to display the total number of button clicks.");

        label = new JLabel(labelPrefix + "0    ");

        JPanel pane = new JPanel();
        pane.setBorder(BorderFactory.createEmptyBorder(30, 30, 10, 30));
        pane.setLayout(new GridLayout(0, 1));
        pane.add(button);
        pane.add(label);
        setContentPane(pane);
    }

    public void actionPerformed(ActionEvent e) {
        numClicks++;
        label.setText(labelPrefix + numClicks);
    }
    
    public static void main(String[] args) {
        try {
            UIManager.setLookAndFeel(
                UIManager.getCrossPlatformLookAndFeelClassName());
        } catch (Exception e) {
            System.err.println("Couldn't use the cross-platform "
                             + "look and feel: " + e);
        }

        JFrame frame = new HelloSwing();

        WindowListener l = new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        };
        frame.addWindowListener(l);

        frame.pack();
        frame.setVisible(true);
    }
}