Comparing two Collections in Java

Question

I have two Collections in a Java class.The first collection contains previous data, the second contains updated data from the previous collection.

I would like to c

Answer 1

If not worried about cases like (2,2,3), (2,3,3):

static  boolean equals(Collection lhs, Collection rhs) {
    return lhs.size( ) == rhs.size( ) && lhs.containsAll(rhs)  && rhs.containsAll(lhs);
}