ch8_e8_17.java

来自「清华的Java程序」· Java 代码 · 共 28 行

import javax.swing.*; 
import java.awt.*;
import java.awt.event.*;

public class ch8_e8_17 extends JApplet implements ActionListener
{
    JButton myButton = new JButton(new ImageIcon("normal.gif"));
    
    public void init()
    {
        myButton.setPressedIcon(new ImageIcon("pressed.gif"));
        myButton.setRolloverIcon(new ImageIcon("rollover.gif"));
        myButton.setRolloverEnabled(true);
        myButton.setToolTipText("change");
        getContentPane().add("North",myButton);
        myButton.addActionListener(this);
    }
    
    public void actionPerformed(ActionEvent ae)
    {
        if(ae.getSource() == myButton)
        {
            showStatus("单击按钮！");
        }
    }
}