jpopupmenutest.java

SWING组件与布局管理器例子

/**
 *　弹出菜单的测试
 */
import javax.swing.JMenuBar;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JPopupMenu;
import javax.swing.JMenuItem;
import javax.swing.ImageIcon;
import java.awt.Container;
import java.awt.event.MouseEvent;
import java.awt.event.MouseAdapter;

public class JPopupMenuTest
{
	public static void main(String[] args)
	{
		JMenuItemFrame  frame = new JMenuItemFrame();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.show();
	}
}

class JMenuItemFrame extends JFrame
{
	private static final int WIDTH = 400;
	private static final int HEIGHT = 300;
	private JPopupMenu popupMenu;
	
	public JMenuItemFrame()
	{
        setSize(WIDTH, HEIGHT);//设置框架的大小		
        setTitle("弹出菜单的测试");//设置框架的标题
        
        JMenuBar menuBar = new JMenuBar();
        setJMenuBar(menuBar);
        
        JMenu fileMenu = new JMenu("文件");
        JMenu editMenu = new JMenu("编辑");
        JMenu helpMenu = new JMenu("帮助");
        
        menuBar.add(fileMenu);
        menuBar.add(editMenu);
        menuBar.add(helpMenu);
        
        popupMenu = new JPopupMenu();
        JMenuItem cutItem = new JMenuItem("Cut", new ImageIcon("cut.gif"));
        JMenuItem pasteItem = new JMenuItem("Paste", new ImageIcon("paste.gif"));
        JMenuItem copyItem = new JMenuItem("Copy");
        popupMenu.add(cutItem);
        popupMenu.add(pasteItem);
        popupMenu.addSeparator();
        popupMenu.add(copyItem);

        Container con = getContentPane();
        con.addMouseListener(new MouseAdapter()
        {
        	public void mouseReleased(MouseEvent event)
        	{
        		if(event.isPopupTrigger())
        		{
        			popupMenu.show(event.getComponent(), event.getX(), event.getY());
        		}
        	}
        });
    }       
        
}