JAVA I Provided as much code as possible I need help with the reverse method Please Help!!

(2.5 points) Write a method of the ArrayList300 class (also from the hw4.jar file). called reverseList. It destructively changes the ArrayList300 object so that the ordering of the items in the list are reversed. The TestHW4 class makes a sample call to reverse. The output of this portion of the main method should be: 3 Prior to reversal, the list is [l, 2, 3] After reversal, the list is [3, 2, 1]