What is the difference between google's ImmutableList and Collections.unmodifiableList ()?

Question

From ImmutableList javadocs:

Unlike Collections.unmodifiableList(java.util.List), which is a view of a separate collection that can still change

Answer 1

You might also want to take a look at this question (What's the difference between Collections.unmodifiableSet() and ImmutableSet of Guava).