求Java大佬看看错在哪

求Java大佬看看错在哪import java.awt.*;import java.net.URL;import javax.swing.*;public class MyImageIcon extends JFrame{ public MyImageIcon(){ Container c=getContentPane(); JLabel jl=new JLabel("这是一个JFrame窗体",JLabel.CENTER); URL url=MyImageIcon.class.getResource("1.jpg"); Icon icon=new ImageIcon(url); jl.setIcon(icon); jl.setHorizontalAlignment(SwingConstants.CENTER); jl.setOpaque(true); c.add(jl); setSize(500,500); setVisible(true); setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE); } public static void main(String []agre){ new MyImageIcon(); }}

但是我老是过不了