can someone help me? were using java, please attach code text and put comments

11. Write a method called symmetricSetDif- ference that accepts two Sets as parame- ters and returns a new Set containing their symmetric set difference (that is, the set of elements contained in either of the two sets but not in both). For example, the symmetric difference between the sets [1, 4, 7, 9] and [2, 4, 5, 6, 7] is [1, 2, 5, 6, 9]