难以在同一jlabel上重新显示其他img

改变这个

if(ae.getSource() == submit)    {        pictures = new ImageIcon("galileo2.jpg");        images = new JLabel(pictures);        System.out.println("test");    }

至

if(ae.getSource() == submit)    {        pictures = new ImageIcon("galileo2.jpg");        images.setIcon(pictures);        System.out.println("test");    }