10.24popupmenudemo.java

JAVA程序设计的源代码

import java.awt.*;
import java.awt.event.*;
public class PopupMenuDemo extends Frame implements MouseListener{
TextArea t;
PopupMenu pm;
public PopupMenuDemo(){
super ("快捷菜单示例");    //显示调用父类方法
t=new TextArea();
add("Center",t);
pm=new PopupMenu();    //创建弹出式菜单
MenuItem mi1=new MenuItem("宋体");    //创建菜单项  
MenuItem mi2=new MenuItem("黑体");
MenuItem mi3=new MenuItem("隶书");
pm.add(mi1);    //向弹出式菜单中添加菜单项
pm.add(mi2);
pm.add(mi3);
t.add (pm);
t.addMouseListener(this);    //设置事件监听
setSize(300,200);
setVisible(true);
}
public void mouseReleased(MouseEvent e){    //鼠标事件处理函数   
if(e.isPopupTrigger()){
pm.show((Component)e.getSource(),e.getX(),e.getY());    //获取鼠标当前位置
}
}
public void mousePressed(MouseEvent e){}
public void mouseClicked(MouseEvent e){}
public void mouseEntered(MouseEvent e){}
public void mouseExited(MouseEvent e){}
public static void main(String []args){
new PopupMenuDemo();
}
}