（右键）弹出式菜单

import java.awt.*;
import java.awt.event.*;
import java.awt.event.MouseListener;
import java.awt.event.MouseEvent;
//练习弹出式菜单
public class Demo10 extends Frame implements MouseListener
{
    PopupMenu        pop    = new PopupMenu();
    MenuItem         item1  = new MenuItem("黄山");
    MenuItem         item2  = new MenuItem("庐山");
    MenuItem         item3  = new MenuItem("泰山");
    MenuItem         item4  = new MenuItem("华山");
    CheckboxMenuItem check1 = new CheckboxMenuItem("长江");
    CheckboxMenuItem check2 = new CheckboxMenuItem("黄河");
    
    Demo10()
    {
        setSize(500,500);
        add(pop);
        pop.add(item1);
        pop.add(item2);
        pop.add(item3);
        pop.add(item4);
        pop.addSeparator();//分割线
        pop.add(check1);
        pop.add(check2);
        
        this.addMouseListener(this);
        setVisible(true);
    }
    
    public static void main(String s[])
    {
        new Demo10();
    }

    public void mouseClicked(MouseEvent parm1) {
        // TODO: Add your code here
        if(parm1.getButton()==MouseEvent.BUTTON3)
        {
            int x = parm1.getX();
            int y = parm1.getY();
            pop.show(this,x,y);
        }
    }

    public void mousePressed(MouseEvent parm1) {
        // TODO: Add your code here
    }

    public void mouseReleased(MouseEvent parm1) {
        // TODO: Add your code here
    }

    public void mouseEntered(MouseEvent parm1) {
        // TODO: Add your code here
    }

    public void mouseExited(MouseEvent parm1) {
        // TODO: Add your code here
    }
}