package event;import java.awt.*;
import java.awt.event.*;
import javax.swing.*;public class EventDemo3
{
public EventDemo3()
{
JFrame f = new JFrame("EventDemo3");
Container contentPane = f.getContentPane();
JButton b = new JButton("按我有声音喔");
b.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
Toolkit.getDefaultToolkit().beep();
}});
contentPane.add(b);
f.pack();
f.show();
f.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e)
{
System.exit(0);
}});
} public static void main(String args[])
{
new EventDemo3();
}
}
import java.awt.event.*;
import javax.swing.*;public class EventDemo3
{
public EventDemo3()
{
JFrame f = new JFrame("EventDemo3");
Container contentPane = f.getContentPane();
JButton b = new JButton("按我有声音喔");
b.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
Toolkit.getDefaultToolkit().beep();
}});
contentPane.add(b);
f.pack();
f.show();
f.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e)
{
System.exit(0);
}});
} public static void main(String args[])
{
new EventDemo3();
}
}
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