Write main method

Collection Programming Write a method removeMin that takes as a parameter a Set of Integers. From that Set the method should remove the smallest integer in the set and return that integer Example: A Set called s contains the following values: s = {3, 4, 5, 8, 9, 12, 14, 13, 1, 2, 0, 20). After calling z = removeMin(s) the returned set should contain the following values: s = {3, 4, 5, 8, 9, 12, 14, 13, 1, 2, 20}. And the value 0(zero) should be returned and put into z. Note: as the set may be a hashSet, you cannot assume that the first element is the smallest. Set x1 = new HashSet(); xl.add(3); xl.add(4); xl.add(5); x1.add(8); xl.add(9); x1.add (12); x1.add (14); x1.add (13); xl.add (1); x1.add (2); xl.add(0); x1.add (20); System.out.println("Before : "+x1); int ans = removeMin (xl); System.out.println("Removed : " ans); System.out.println("After : " +x1)