Swing-右键菜单

MyFrame ：

设计思路：

1、创建JPopup右键菜单对象；

2、添加内容面板JPanel；

3、创建一个自定义的右键菜单项目键，包括图片+名字+事件；

4、将菜单项添加到右键菜单；

5、添加面板事件处理：当右键点击面板时，出现右键菜单；

6、创建一个监听器，用于表示点击菜单项操作；

package swing01;

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.net.URL;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JToolBar;

public class MyFrame extends JFrame {
	
	//弹出式菜单
	JPopupMenu popup=new JPopupMenu();
	
	public MyFrame(String title)
	{
		super(title);
		
		//内容面板
		JPanel root=new JPanel();
		this.setContentPane(root);
		root.setLayout(new BorderLayout());
		
		//右键菜单
		popup.add( createMenuItem("ic_open.png", "fileOpen","打开"));
		popup.add( createMenuItem("ic_save.png", "fileSave","保存"));
		popup.add( createMenuItem("ic_saveas.png","fileSaveAs","另存为"));
		popup.addSeparator();
		popup.add( createMenuItem("ic_help.png", "fileHelp","帮助"));
		
		//添加鼠标响应事件，当点击右键时，弹出菜单
		root.addMouseListener(new MouseAdapter() {

			@Override
			public void mouseClicked(MouseEvent e) {
				// TODO Auto-generated method stub
				super.mouseClicked(e);
				if(e.getButton()==MouseEvent.BUTTON3)
				{
					popup.show(e.getComponent(), e.getX(), e.getY());
				}
			}
			
		});
		
	}
	
	
	
	protected JMenuItem createMenuItem(String iceName,String action,String text)
	{
		JMenuItem item=new JMenuItem(text);
		item.setActionCommand(action);
		item.addActionListener(actionListener);
		if(iceName!=null)
		{
			String imagePath="/images/"+iceName;
			URL imageURL=getClass().getResource(imagePath);
			item.setIcon(new ImageIcon(imageURL));
		}
		return item;
	}
	
	//创建一个监听器
	//注意：actionListener是类的属性
	private ActionListener actionListener=new ActionListener() {

		@Override
		public void actionPerformed(ActionEvent e) {
			// TODO Auto-generated method stub
			String action=e.getActionCommand();
			System.out.println("执行命令："+action);
			
			//当是打开命令时，再弹出一个窗口
			if(action.equals("fileOpen"))
			{
				JOptionPane.showMessageDialog(MyFrame.this, action);
			}
			
		}
		
	};

}

main

package swing01;

import java.awt.Container;
import java.awt.FlowLayout;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class MyDemo
{
	private static void createGUI()
	{
		// JFrame指一个窗口，构造方法的参数为窗口标题
		JFrame frame = new MyFrame("Swing Demo");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
				// 设置窗口的其他参数，如窗口大小
		frame.setSize(400, 300);
		
		// 显示窗口
		frame.setVisible(true);
	}
	
	public static void main(String[] args)
	{
	
		javax.swing.SwingUtilities.invokeLater(new Runnable() {
			public void run()
			{
				createGUI();
			}
		});

	}
}