can someone help ? were using Java attach file header block comments please

Exercise Write a method intersect that accepts two sorted array lists of integers as parameters and returns a new list that contains only the elements that are found in both lists. Example: if lists named list1 and list2 initially store: [1, 4, 8, 9, 11, 15, 17, 28, 41, 59] [4, 7, 11, 17, 19, 20, 23, 28, 37, 59, 81] Then the call of intersect (listi, list2) returns the list: [4, 11, 17, 28, 59]