How to append the contents of a list at the end of the other list?

Question

How do I append the contents of one list at the end of another list?

Answer 1

List finalist = a + b

Example:

List a = [1,4]
List b = [2,3]
List c = a+b

Result:

c = [1, 4, 2, 3]

Answer 2

listA.addAll(listB)

Answer 3

List.addAll()