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//Java program to demonstrate a TreeSet import java.util.*; class TreeSet3{ public static void main(String args[]){ TreeSet<Integer> set=new TreeSet<Integer>(); set.add(24); set.add(66); set.add(12); set.add(15); System.out.println("Lowest Value: "+set.pollFirst()); System.out.println("Highest Value: "+set.pollLast()); } }