Eclipse - NullPointerException for the simples possible applet

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si - 22 Mar 2006 13:03 GMT

Hello

I've just started using Eclipse 3.2.1 and I've observed that every few
launches of the simples possible applet (see the code below) I get the
following error (it happens only when exitin applet viewer):

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException:
component argument pData
at sun.awt.windows.Win32SurfaceData.initOps(Native Method)
at sun.awt.windows.Win32SurfaceData.<init>(Win32SurfaceData.java:448)
at sun.awt.windows.Win32SurfaceData.createData(Win32SurfaceData.java:316)
at
sun.awt.Win32GraphicsConfig.createSurfaceData(Win32GraphicsConfig.java:357)
at
sun.awt.windows.WComponentPeer.replaceSurfaceData(WComponentPeer.java:332)
at
sun.awt.windows.WComponentPeer.replaceSurfaceData(WComponentPeer.java:313)
at sun.awt.windows.WComponentPeer$2.run(WComponentPeer.java:353)

The applet code looks like this:

import javax.swing.JApplet;

public class dummy extends JApplet {

    /** Constructor */
    public dummy() throws HeadlessException {
    super();
    // TODO Auto-generated constructor stub
    }

}

Is this a bug or I'm doing something wrong?
Thanks
si

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Patricia Shanahan - 22 Mar 2006 18:03 GMT

...

> The applet code looks like this:
>
[quoted text clipped - 13 lines]
> Thanks
> si

I changed the name, because I didn't want a class called just "dummy"
floating around in my test directory, and added an import for
java.awt.HeadlessException to get it to compile. The result ran:

import javax.swing.JApplet;
import java.awt.HeadlessException;

public class DummyApplet extends JApplet {

/** Constructor */
public DummyApplet() throws HeadlessException {
super();
// TODO Auto-generated constructor stub
}

}

Does this run on your system?

Patricia

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si - 22 Mar 2006 18:58 GMT

> I changed the name, because I didn't want a class called just "dummy"
> floating around in my test directory, and added an import for
[quoted text clipped - 16 lines]
>
> Patricia

Sorry, I forgot about the line with HeadlessException import.
I have it in my code but it crashes anyway.

I have two computers, both XP Pro SP2. The applet runs ok on one of them
(that is on the computer it was created) and crushes on the other one.
Maybe this is a metter of some project settings, I don't know.

si

Reply to this Message

Oliver Wong - 22 Mar 2006 20:01 GMT

> Hello
>
[quoted text clipped - 30 lines]
>
> Is this a bug or I'm doing something wrong?

It's a bug. See
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5062191

- Oliver

Reply to this Message

si - 23 Mar 2006 08:34 GMT

> It's a bug. See
> http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5062191
>
> - Oliver

Thank you!
si

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Eclipse - NullPointerException for the simples possible applet

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