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From "Vasily Zakharov (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-3430) [classlib][swing] DebugGraphics.getClip() throws NPE
Date Thu, 22 Mar 2007 14:40:32 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-3430?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vasily Zakharov updated HARMONY-3430:
-------------------------------------

    Summary: [classlib][swing] DebugGraphics.getClip() throws NPE  (was: [classlib][awt] DebugGraphics.getClip()
throws NPE)

> [classlib][swing] 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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