ch9_56.java

60多个javaSwing范例

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import javax.swing.event.*;
import javax.swing.border.*;
public class ch9_56 extends JFrame
{
	public ch9_56()
	{
		super("菜单演示");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(20,20,500,300);
		
	}
	public static void main(String [] args)
	{
		ch9_56 f=new ch9_56();

		PopupPanel pp=new PopupPanel();
		
		f.getContentPane().add(pp);
		
		
		f.setVisible(true);
	}
}
class PopupPanel extends JPanel implements MouseListener,PopupMenuListener,ActionListener
{
	static JPopupMenu Popup;
	public PopupPanel()
	{
		Popup=new JPopupMenu();
		
		JMenuItem theItem;
		Popup.add(theItem=new JMenuItem("cut",new ImageIcon("cut.gif")));
		theItem.addActionListener(this);
		Popup.add(theItem=new JMenuItem("copy",new ImageIcon("paste.gif")));
		theItem.addActionListener(this);
		Popup.add(theItem=new JMenuItem("open",new ImageIcon("open.gif")));
		theItem.addActionListener(this);
		
		Popup.setBorder(new BevelBorder(BevelBorder.RAISED));
	
		Popup.addPopupMenuListener(this);
		
		addMouseListener(this);
		
	}
	public void mouseClicked(MouseEvent me)
	{
		System.out.print("fasd");
		checkPopup(me);
	}
	public void mousePressed(MouseEvent me)
	{
		checkPopup(me);
	}
	public void mouseReleased(MouseEvent me)
	{
		checkPopup(me);
	}
	public void mouseEntered(MouseEvent me){}
	public void mouseExited(MouseEvent me){}
	
	private void checkPopup(MouseEvent me)
	{
		if(me.isPopupTrigger())
		{
			System.out.print("fdsfa");
			Popup.show(me.getComponent(),me.getX(),me.getY());
		}
	}
	public void popupMenuWillBecomeVisible(PopupMenuEvent e){}
	public void popupMenuWillBecomeInvisible(PopupMenuEvent e){}
	public void popupMenuCanceled(PopupMenuEvent e){}
	public void actionPerformed(ActionEvent e){}
}