Writing on system clipboard from an applet.

Question

Is it possible?
I have tried to write on it but an exception is occoured:
java.security.AccessControlException: access denied (java.awt.AWTPermission accessClipboard)
The code that I have used is:
import java.security.*;
import java.awt.*;
import java.awt.datatransfer.*;
import javax.swing.*;
public class Blah extends JApplet {
public void init() {
String exampleStr = "Hi!";
Clipboard clipboard;
Transferable trans;
StringSelection strSelect;
try {
SecurityManager security = System.getSecurityManager();
if (security != null)
security.checkSystemClipboardAccess();
clipboard=Toolkit.getDefaultToolkit().getSystemClipboard();
strSelect = new StringSelection(exampleStr);
trans = (Transferable)strSelect;
clipboard.setContents(trans, strSelect);
System.out.println("Clipboard copy successful");
catch (Exception e) {
System.err.println("Clipboard copy failed");
System.err.println(e);
Thanks

Answer 1

First, your applet must be signed to access the system clipboard. And on Netscape 4.7.x, you need to enable the privilege from within the same method where you get the system clipboard. On IE 5.5/6.0, signing the applet is all that is necessary.
Here's what I do on Netscape:
Make sure when you call "PrivilegeManager.enablePrivilege("UniversalSystemClipboardAccess");", that you get the system clipboard within the same method. Failure to do this will cause a ForbiddenTargetException.
My code looks like:
public java.awt.datatransfer.Clipboard getSystemClipboard()
java.awt.datatransfer.Clipboard clipboard = null;
try
PrivilegeManager.enablePrivilege("UniversalSystemClipboardAccess");
clipboard = java.awt.Toolkit.getDefaultToolkit().getSystemClipboard();
PrivilegeManager.revertPrivilege("UniversalSystemClipboardAccess");
catch (netscape.security.ForbiddenTargetException se)
se.printStackTrace();
catch(Exception e)
e.printStackTrace();
return clipboard;
This works successfully on Netscape 4.7.8. On IE 5.5/6.0, I didn't have to do anything other than having a signed applet to get the system clipboard. With the code above, I also am using a signed applet.
Hope this helps anyone else trying to make this work.
-Dave.