首先给jLabel加个mouseClicked事件,然后用e.getSource得到对象

    jLabel1.addMouseListener(new java.awt.event.MouseAdapter() {
      public void mouseClicked(MouseEvent e) {
        jLabel1_mouseClicked(e);
      }
    });
  void jLabel1_mouseClicked(MouseEvent e) {  JOptionPane.showConfirmDialog(null,e.getSource(),"Dialog",JOptionPane.CLOSED_OPTION);  }