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https://issues.apache.org/jira/browse/LANG-412?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12568433#action_12568433
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Henri Yandell commented on LANG-412:
------------------------------------

Confirmed (visually). As appendNull's effect is to do nothing if it is set to 
null, my assumption is that having nullText be null is merely an optmization 
for the empty String.

So I think the solution will be to make the fixed width methods use an empty 
string if they get back a null nullText.

> StrBuilder appendFixedWidth does not handle nulls
> -------------------------------------------------
>
>                 Key: LANG-412
>                 URL: https://issues.apache.org/jira/browse/LANG-412
>             Project: Commons Lang
>          Issue Type: Bug
>    Affects Versions: 2.3
>         Environment: Java  1.5
>            Reporter: Peter Oxenham
>             Fix For: 2.4
>
>
> Appending a null value with fixed width causes a null pointer exception if 
> getNullText() has not been set.

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