ch8_e8_15.java

来自「清华的Java程序」· Java 代码 · 共 45 行

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

public class ch8_e8_15 
{
    public static void main(String args[])
    {
        new MyFrame();
    }
}

class MyFrame extends Frame implements ActionListener
{
    JButton myButton = new JButton("Change It!");
    
    MyFrame()
    {
        super("我的窗口");
        add("North",myButton);
        myButton.addActionListener(this);
        addWindowListener(new closeWin());

        setSize(300,200);
        setVisible(true);
    }
    
    public void actionPerformed(ActionEvent ae)
    {
        if(ae.getSource() == myButton)
        {
            setTitle("单击按钮！");
        }
    }
}

class closeWin extends WindowAdapter
{
    public void windowClosing(WindowEvent we)
    {
        we.getWindow().dispose();
        System.exit(0);
    }
}