List difference in java

Question

I have two ArrayList as follows:

original: 12, 16, 17, 19, 101

selected: 16, 19, 107, 108, 109

Answer 1

Using Guava library:

List listA = Lists.newArrayList(12,16,17,19,101);
List listB = Lists.newArrayList(16,19,107,108,109);
Set intersection = Sets.intersection(Sets.newHashSet(listA), Sets.newHashSet(listB));
listA.removeAll(intersection);
listB.removeAll(intersection);