Signed Applet can't read an image file??

Question

Hi my dear java folks,
I've written a simple applet and self-signed it in order to have access
to local machine's files.
The applet as you see needs to read an image file (arrow.gif).
The applet is:
import.....
public class MyApplet extends JApplet{
JButton button1=new JButton("Save");
JButton button2=new JButton(new ImageIcon("arrow.gif"));
public void init(){
button1.setBounds(10,70,80,20);
button2.setBounds(10,100,80,20);
getContentPane().setLayout(null);
getContentPane().add(button1);
getContentPane().add(button2);
The java.policy file is:
keystore ".//myworkingstore.store";
grant codeBase "http://fin2000/htdocs/MyApplet.class" {
permission java.io.FilePermission "<<ALL FILES>>","read";
permission java.io.AllPermission;
grant codeBase "." signedBy "MyName" {
permission java.io.FilePermission "${user.home}/*.*","read,write";
permission java.io.FilePermission "<<ALL FILES>>","read";
permission java.io.AllPermission;
The java.security file is on the server
(on my server I have Oracle8.1/Apache installed):
policy.url.1=file:d:/oracle/ora81/apache/apache/htdocs/java.policy;
My problem is when I run my applet through a html file
"http://myServerName/test.html" in my browser, the applet
runs correctly except it's button2 (the iconized button), the
button comes without it's ImageIcon on it.
I receive no errors, no messages and no signs of error
I am completely confused!
Need Urgent Help
Thank you , Jamanir

Answer 1

Hi,
this has nothing to do with a security problem.
Change you code as follow:
  JButton button2 = new JButton(new ImageIcon(getClass().getResource("arrow.gif")) ;Pack arrow.gif in the same directory/package as MyApplet.class in the jar file and It should solve your problem...
The problem is that when you write new ImageIcon("arrow.gif"), it works locally as a standalone application, because "arrow.gif" is mapped to the current directory where you application is started from. This has no meaning when you works online with an applet. That's the reason why your graphic was not found.
getClass().getResource("arrow.gif") returns an URL pointing to a file "arrow.gif" located at the same location as the class. This always works either locally or online, other packed in a Jar file, or unpacked.
Yannick