please help me code for GENERIC method

Java

Uniqueness

a method called unique() which takes in a List and returns true if all the items in the List are unique. All the items are unique if none of them are the same.2 Return false otherwise.

isPermutation

a method called isPermutaion() which takes in two List objects which contain the same types. It returns true if the Lists are permutations of each other and false if not. Two lists are permutations if they contain the same elements, including the same number of duplicates, but they don't have to contain the elements in the same order. For example, [1,2, 4] and [2,1,4] are permutations of each other.