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Date: Thu, 22 Mar 2007 07:37:32 -0700 (PDT)
From: "Andrey Pavlenko (JIRA)" <jira@apache.org>
To: commits@harmony.apache.org
Subject: [jira] Commented: (HARMONY-3430) [classlib][awt]
 DebugGraphics.getClip() throws NPE
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    [ https://issues.apache.org/jira/browse/HARMONY-3430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12483156 ] 

Andrey Pavlenko commented on HARMONY-3430:
------------------------------------------

BTW, new DebugGraphics().getClip(); also throws NPE on RI. It looks like on RI this method is not invoked by Container.paint().

> [classlib][awt] DebugGraphics.getClip() throws NPE
> --------------------------------------------------
>
>                 Key: HARMONY-3430
>                 URL: https://issues.apache.org/jira/browse/HARMONY-3430
>             Project: Harmony
>          Issue Type: Bug
>          Components: Classlib
>            Reporter: Vasily Zakharov
>         Assigned To: Alexey Petrenko
>            Priority: Minor
>
> Consider the following test:
> import java.awt.Container;
> import javax.swing.DebugGraphics;
> public class Test {
>     public static void main(String args[]) throws Exception {
>         new Container().paint(new DebugGraphics());
>         System.out.println("SUCCESS");
>     }
> }
> Output on RI:
> SUCCESS
> Output on Harmony:
> Exception in thread "main" java.lang.NullPointerException
>         at javax.swing.DebugGraphics.getClip(DebugGraphics.java:769)
>         at java.awt.Container.paintComponentsImpl(Container.java:996)
>         at java.awt.Container.paint(Container.java:936)
>         at Test.main(Test.java:6)
> The reason for that is getClip() references originalGraphics field, that is initialized with null by no-parameter constuctor.
> The same problem also exists for many other DebugGraphics methods that reference originalGraphics directly.
> The proper resolution would be either checking originalGraphics for null each time before using, or initialize originalGraphics with some non-null value. I'm not sure which way is right to follow.

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