ch7_e7_30.java

来自「各种关于JAVA的初级编程」· Java 代码 · 共 56 行

import java.awt.*; 
import java.awt.event.*;

public class ch7_e7_30
{
    public static void main(String args[])
    {
        new MyFrame();
    }
}

class MyFrame extends Frame implements ActionListener
{
    MenuBar m_MenuBar;
    Menu menuFile;
    MenuItem mi_File_Exit;
    
    MyFrame()
    {
        super("我的窗口");
        
        m_MenuBar = new MenuBar();
        menuFile = new Menu("文件");
        mi_File_Exit = new MenuItem("退出");
        mi_File_Exit.setActionCommand("退出");
        mi_File_Exit.addActionListener(this);
        menuFile.add(mi_File_Exit);
        m_MenuBar.add(menuFile);
        
        this.setMenuBar(m_MenuBar);
        this.addWindowListener(new closeWindow());
        
        setSize(300,200);
        setVisible(true);
    }
    
    public void actionPerformed(ActionEvent ae)
    {
        if(ae.getActionCommand().equals("退出"))
        {
            dispose();
            System.exit(0);
        }
    }
}

class closeWindow extends WindowAdapter
{
    public void windowClosing(WindowEvent we)
    {
        Frame frm = (Frame)we.getWindow();
        frm.dispose();
        System.exit(0);
    }
}