// Tester class main method has the below code Name n1 = new Name("John", "Smith"); Name n2 = new Name("John", "Smith"); SortedSet<Name> mySet = new TreeSet<>(); System.out.println(mySet.add(n1)); System.out.println(n1.equals(n2)); System.out.println(n1.compareTo(n2)); System.out.println(mySet.add(n2));