//PopButtonTestApplet.java
//在Applet中彈出窗口
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class PopButtonTestApplet extends JApplet
{  
   private JFrame frame;
   public void init()
   {  
      frame = new JFrame();
      frame.setTitle("點擊按鈕改變顏色");
      frame.setSize(300, 200);
      frame.getContentPane().add(new ButtonPanel());
      JButton PopButton = new JButton("請點擊");
      getContentPane().add(PopButton);
      PopButton.addActionListener(new ActionListener()
         {
            public void actionPerformed(ActionEvent evt)
            {  
               if (frame.isVisible()) frame.setVisible(false);
               else frame.show();
            }
         });
   }
}

class ButtonPanel extends JPanel
{
    private class ColorAction implements ActionListener
    {
        private Color backgroundColor;
        public void actionPerformed(ActionEvent actionevent)
        {
            setBackground(backgroundColor);
            repaint();
        }

        public ColorAction(Color color)
        {
            backgroundColor = color;
        }
    }

    public ButtonPanel()
    {
        JButton jbutton = new JButton("橙色");
        JButton jbutton1 = new JButton("藍色");
        JButton jbutton2 = new JButton("紅色");
        add(jbutton);
        add(jbutton1);
        add(jbutton2);
        ColorAction coloraction = new ColorAction(Color.orange);
        ColorAction coloraction1 = new ColorAction(Color.blue);
        ColorAction coloraction2 = new ColorAction(Color.red);
        jbutton.addActionListener(coloraction);
        jbutton1.addActionListener(coloraction1);
        jbutton2.addActionListener(coloraction2);
    }
}