mymenu2.java

来自「这个是JAVA程序基础书上第六章处理异常源代码」· Java 代码 · 共 58 行

import java.awt.*;
import java.awt.event.*;
public class MyMenu2{
	Frame win;
	TextArea t;
	PopupMenu pm;
	MenuItem fileOpen, fileSave, fileNew, fileExit;
	public MyMenu2(){
		win = new Frame("弹出式菜单");
		t = new TextArea();
		pm = new PopupMenu();
		fileOpen = new MenuItem("打开");
		fileSave = new MenuItem("保存");
		fileNew  = new MenuItem("新建");
		fileExit = new MenuItem("退出");
		pm.add(fileNew);
		pm.add(fileOpen);
		pm.add(fileSave);
		pm.addSeparator();
		pm.add(fileExit);
		t.add(pm);
		
		t.addMouseListener(new MyMouseListener());
		fileNew.addActionListener(new MyActionListener());
		fileOpen.addActionListener(new MyActionListener());
		fileSave.addActionListener(new MyActionListener());
		fileExit.addActionListener(new MyActionListener());
		
		win.setLayout(new FlowLayout());
		win.addWindowListener(new MyWindowAdapter());
		win.setSize(400, 200);
		win.add(t);
		win.show();
	}
	public void go(){
		PopupMenu p = new PopupMenu();

	} 
	public static void main(String[] args){
		MyMenu2 mm = new MyMenu2();
	}
	class MyMouseListener extends MouseAdapter{
		public void mouseReleased(MouseEvent e){
			if (e.isPopupTrigger())
				pm.show(win, e.getX(), e.getY());
		}
	}
	class MyWindowAdapter extends WindowAdapter{
		public void windowClosing(WindowEvent e){
			System.exit(0);
		}
	}
	class MyActionListener implements ActionListener{
		public void actionPerformed(ActionEvent e){
			t.append("你点击了" + e.getActionCommand() + "命令\n"); 
		}
	}
}