assertFalse( "collection: " + collection + ", should contain all in list: " +
java_list, collection.removeAll( java_list ) );
java_list.add( vals[5] );
assertTrue( "collection: " + collection + ", should contain all in list: " +
java_list, collection.removeAll( java_list ) );
assertFalse( collection.contains( vals[5] ) );
assertFalse( map.containsKey( keys[5] ) );
assertFalse( map.containsValue( vals[5] ) );
java_list = new ArrayList<Integer>();