请大家帮忙看一下这个错误

Question

url必须被捕获import java.awt.*;
import java.applet.*;
import java.net.URL;
public class Applet1 extends Applet
{
Image labmag;
public void init()
{
                  try{
URL url1;
url1=new URL("http://localhost/ChatRoomNew3/A/1.gif");
labmag=getImage(url1);
                  }catch(Exception e){
                  ....................
                  }
}
public void paint(Graphics g)
{
g.drawImage (labmag,0,0,this);
g.drawImage (labmag,0,120,100,100,this);
}
}