Question : List

I have two List collection class. Example List l1 and l2.
In l1 there is 5 objects and in l2 there is 4 objects.
Take note that the values in each object is identitical.
Therefore I only want to know the missing object in
one of the vector. How is it done?.

Your help is kindly appreciate. Thank You.

Answer : List

List missing = new ArrayList(list1);
missing.removeAll(list2);
System.out.println(missing);