怎么在List中添加JPopupMenu？

Question

添加了但是显示不了，很奇怪？

Answer 1

 jTable1.addMouseListener(new MouseAdapter() {
         public void mousePressed(MouseEvent e) {
             if(e.getButton()==3){
              showMenu(e.getX(),e.getY());  
             }
         }
        });    
protected   void   showMenu(int x,int y)  {  
JPopupMenu   popup=new   JPopupMenu();  
        JMenuItem jItem2=new JMenuItem("增加");
        JMenuItem jItem3=new JMenuItem("修改");
        JMenuItem jItem4=new JMenuItem("删除");
        popup.add(jItem2);
        popup.add(jItem3);
        popup.add(jItem4);
        popup.show(jTable1,x,y);        
}