[ https://issues.apache.org/jira/browse/COLLECTIONS-732?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chen updated COLLECTIONS-732:
-----------------------------
    Summary: Got an UnsupportedOperationException when using MultiValuedMap.MapIterator().setValue()  (was: Got an UnsupportedOperationException when altering MultiValuedMap MapIterator setValue)

> Got an UnsupportedOperationException when using MultiValuedMap.MapIterator().setValue()
> ---------------------------------------------------------------------------------------
>
>                 Key: COLLECTIONS-732
>                 URL: https://issues.apache.org/jira/browse/COLLECTIONS-732
>             Project: Commons Collections
>          Issue Type: Bug
>          Components: Map
>            Reporter: Chen
>            Priority: Major
>
> copy from https://issues.apache.org/jira/browse/COLLECTIONS-663
> {code:java}
>     public void testSetValueMapIterator(){
>         final ListValuedMap<K, V> listMap = makeObject();
>         List<V> listA = listMap.get((K) "A");
>         listA.addAll(0, Arrays.asList((V) "W", (V) "X", (V) "F"));
>         List<V> listB = listMap.get((K) "B");
>         listB.addAll(0, Arrays.asList((V) "Q", (V) "Q", (V) "L"));
>         assertEquals("{A=[W, X, F], B=[Q, Q, L]}", listMap.toString());        for(MapIterator<K, V> iterator = listMap.mapIterator(); iterator.hasNext(); ){
>             iterator.next();
>             V value = iterator.getValue();
>             if(value == "F"){
>                 iterator.setValue((V) "B");
>             }
>         }
>         assertEquals("{A=[W, X, B], B=[Q, Q, L]}", listMap.toString());
>     }
> {code}
> The test throws a UnsupportedOperationException when altering mapIterato setValue。
> The issue is that the code throws UnsupportedOperationException  in setValue。So，if setValue method is not supported，the Javadoc should comment。



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