Utility Classes: Collections and Arrays

• Both of these java.util classes provide
• A sort() method. Sort using a Comparator or sort using natural order.
• A binarySearch() method. Search a pre-sorted array or List.
• Arrays.asList() creates a List from an array and links them together.
• Collections.reverse() reverses the order of elements in a List.
• Collections.reverseOrder() returns a Comparator that sorts in reverse.
• Lists and Sets have a toArray() method to create arrays.