iterating and filtering two lists using java 8

Question

I want to iterate two lists and get new filtered list which will have values not present in second list. Can anyone help?

I have two lists - one is list of strings,

Answer 1

// produce the filter set by streaming the items from list 2
// assume list2 has elements of type MyClass where getStr gets the
// string that might appear in list1
Set unavailableItems = list2.stream()
    .map(MyClass::getStr)
    .collect(Collectors.toSet());

// stream the list and use the set to filter it
List unavailable = list1.stream()
            .filter(e -> unavailableItems.contains(e))
            .collect(Collectors.toList());