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https://issues.apache.org/jira/browse/COLLECTIONS-401?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13397322#comment-13397322
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Thomas Le commented on COLLECTIONS-401:
---------------------------------------
the removeAll is calling ListUtils.retainAll instead of ListUtils.removeAll
> Inconsistent Javadoc comment and code in removeAll(Collection<E>,
> Collection<?>) in org.apache.commons.collections.ListUtils
> ----------------------------------------------------------------------------------------------------------------------------
>
> Key: COLLECTIONS-401
> URL: https://issues.apache.org/jira/browse/COLLECTIONS-401
> Project: Commons Collections
> Issue Type: Bug
> Components: Collection
> Affects Versions: 3.2.1
> Reporter: SHIN HWEI TAN
> Labels: javadoc
> Original Estimate: 0.05h
> Remaining Estimate: 0.05h
>
> The Javadoc comment below states that the method "throws NullPointerException
> if either parameter is null".
> /*......
> *
> * @throws NullPointerException if either parameter is null
> */
> public static <E> List<E> removeAll(Collection<E> collection,
> Collection<?> remove) {
> ..
> }
> However, when called with two null collections (i.e.,
> "removeAll((Collection)null, (Collection)null)"), the method executes
> normally without throwing any exception.
> Suggested Fixes:
> 1. Add code "if (collection == null) throw NullPointerException();" at the
> beginning of the method body.
> or
> 2. Remove "@throws NullPointerException if either parameter is null" from the
> Javadoc.
> or
> 3. Change "@throws NullPointerException if either parameter is null" to
> "@throws NullPointerException if the first collection is null or (the first
> collection is non-empty and the second collection is null)".
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