The pollLast() method of java.util.concurrent.ConcurrentSkipListSet is an in-built function in Java which returns retrieves and removes the last (highest) element, or returns null if this set is empty.
public E pollLast()
Return Value: The function returns retrieves and removes the last (highest) element, or returns null if this set is empty.
Below programs illustrate the ConcurrentSkipListSet.pollLast() method:
Contents of the set: [10, 20, 30, 40, 50] The Last element of the set: 50 Contents of the set after pollLast: [10, 20, 30, 40]
Contents of the set:  The Last element of the set: null
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