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https://issues.apache.org/jira/browse/COLLECTIONS-506?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13860143#comment-13860143
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Anthony Communier commented on COLLECTIONS-506:
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Thank you !
> Result of CollectionUtils are different between version 3.2.1 and version 4.0
> -----------------------------------------------------------------------------
>
> Key: COLLECTIONS-506
> URL: https://issues.apache.org/jira/browse/COLLECTIONS-506
> Project: Commons Collections
> Issue Type: Bug
> Affects Versions: 4.0
> Reporter: Anthony Communier
> Fix For: 4.0.1
>
> Attachments: test-common-collection.zip
>
>
> CollectionUtils V3 uses equals to compute results but not CollectionUtils v4
> (it seems to use ==)
> The following exemple with subtract method :
> List<ObjectTest> listA = new ArrayList<ObjectTest>();
> List<ObjectTest> listB = new ArrayList<ObjectTest>();
> listA.add(new ObjectTest("Test1"));
> listA.add(new ObjectTest("Test2"));
> listA.add(new ObjectTest("Test3"));
> listB.add(new ObjectTest("Test1"));
> listB.add(new ObjectTest("Test2"));
> Collection<?> res1 =
> org.apache.commons.collections.CollectionUtils.subtract(listA, listB);
> System.out.println("Res1 size = " +res1.size());
> Collection<?> res2 =
> org.apache.commons.collections4.CollectionUtils.subtract(listA, listB);
> System.out.println("Res2 size = " +res2.size());
> Produces this :
> Res1 size = 1
> Res2 size = 3
> The new behaviour is not useful. It would be better to have the V3 behaviour
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