demojpopupmenu.java

来自「java netbeans 学习程序合集」· Java 代码 · 共 72 行

/*
 * DemoJPopupMenu.java
 *
 * Created on 2007年8月3日, 下午9:38
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package org.Adam;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
/**
 *
 * @author Administrator
 */
public class DemoJPopupMenu extends JFrame{
    JMenu fileMenu;
    JPopupMenu jPopupMenuOne;
    JMenuItem openFile,closeFile,exit;
    JRadioButtonMenuItem copyFile,pasteFile;
    ButtonGroup buttonGroupOne;
    /** Creates a new instance of DemoJPopupMenu */
    public DemoJPopupMenu() {
    jPopupMenuOne=new JPopupMenu();
    buttonGroupOne=new ButtonGroup();
    fileMenu=new JMenu("文件");
    openFile=new JMenuItem("打开");
    closeFile=new JMenuItem("关闭");
    fileMenu.add(openFile);
    fileMenu.add(closeFile);
    jPopupMenuOne.add(fileMenu);
    jPopupMenuOne.addSeparator();
    copyFile=new JRadioButtonMenuItem("复制");
    pasteFile=new JRadioButtonMenuItem("粘贴");
    buttonGroupOne.add(copyFile);
    buttonGroupOne.add(pasteFile);
    jPopupMenuOne.add(copyFile);
    jPopupMenuOne.add(pasteFile);
    jPopupMenuOne.addSeparator();
    exit=new JMenuItem("退出");
    jPopupMenuOne.add(exit);
    MouseListener popupListener=new PopupListener(jPopupMenuOne);
    this.addMouseListener(popupListener);
    this.setTitle("弹出式菜单的简单使用");
    this.setBounds(100,100,250,150);
    this.setVisible(true);
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new DemoJPopupMenu();
    }
    class PopupListener extends MouseAdapter{
        JPopupMenu popupMenu;
        PopupListener(JPopupMenu popupMenu){
            this.popupMenu=popupMenu;
        }
        public void mousePressed(MouseEvent e){
            showPopupMenu(e);
        }
        public void mouseReleased(MouseEvent e){
            showPopupMenu(e);
        }
        private void showPopupMenu(MouseEvent e){
            if(e.isPopupTrigger()){
                popupMenu.show(e.getComponent(),e.getX(),e.getY());
            }
        }
    }
}