Swing JPopupMenu问题

Question

关于Swing JPopupMenu的选择项返回值问题。。JMenuItem copy = new JMenuItem("コピー");
JMenuItem paste = new JMenuItem("貼り付け");
copy.setEnabled(true);
peast.setEnabled(true);
popupmenu.add(copy);
popupmenu.add(paste);
popupmenu.show(e.getComponent(), e.getX(), e.getY());popupmenu.addPopupMenuListener(new PopupMenuListener() { public void popupMenuCanceled(PopupMenuEvent arg0) {} public void popupMenuWillBecomeInvisible(PopupMenuEvent arg0) {
                  
                  //我想在这里获得Popup选择的项
                  //如果选择Copy返回个东东
                  //如果选择paste也返回一个东西
if (Copy){
                      //............................
                   }
                   if (paste){
                      //............................
                   } } public void popupMenuWillBecomeVisible(PopupMenuEvent arg0) {}

});

Answer 1

final JMenuItem copy = new JMenuItem("コピー");
final JMenuItem paste = new JMenuItem("貼り付け");
copy.setEnabled(true);
peast.setEnabled(true);  ActionListener listener = new ActionListener() {  @Override
  public void actionPerformed(ActionEvent e) {
  
    Object source = e.getSource();
    if( source == copy ) {
      
      // ...
    }
    else if( source == paste ) {      // ...
    }
  }
}copy.addActionListener(listener);
paste.addActionListener(listener);popupmenu.add(copy);
popupmenu.add(paste);// ...