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
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