Anthony Communier created COLLECTIONS-506:
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Summary: Result of CollecrionUtils are different from 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
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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