swing容器添加弹出式菜单（jbutton,jlabel等等空间）

Adding Menu Items to a JPopupMenu
public  JMenuItem add ( JMenuItem menuItem ) ;
public  JMenuItem add ( String label ) ;
public  JMenuItem add ( Action action ) ;
public  void  addSeparator () ;


 
import  javax.swing.JButton;
import  javax.swing.JFrame;
import  javax.swing.JMenuItem;
import  javax.swing.JPopupMenu;

public class  PopupSample  {

   public static  void  main ( final  String args []) {
     JFrame frame =  new  JFrame ( "http://www.my400800.cn   PopupSample Example" ) ;
     frame.setDefaultCloseOperation ( JFrame.EXIT_ON_CLOSE ) ;
     // Create popup menu, attach popup menu listener
     JPopupMenu popupMenu =  new  JPopupMenu ( "Title" ) ;

 

     // Cut
     JMenuItem cutMenuItem =  new  JMenuItem ( "Cut" ) ;
     popupMenu.add ( cutMenuItem ) ;

     // Copy
     JMenuItem copyMenuItem =  new  JMenuItem ( "Copy" ) ;
     popupMenu.add ( copyMenuItem ) ;
     // Paste
     JMenuItem pasteMenuItem =  new  JMenuItem ( "Paste" ) ;
     pasteMenuItem.setEnabled ( false ) ;
     popupMenu.add ( pasteMenuItem ) ;

     // Separator
     popupMenu.addSeparator () ;

     // Find
     JMenuItem findMenuItem =  new  JMenuItem ( "Find" ) ;
     popupMenu.add ( findMenuItem ) ;
     JButton label =  new  JButton () ;
     frame.add ( label ) ;
     label.setComponentPopupMenu ( popupMenu ) ;

     frame.setSize ( 350 ,  250 ) ;
     frame.setVisible ( true ) ;
   }
}