@@ -0,0 +1,676 @@
+import java.util.HashSet;%0Aimport java.util.Scanner;%0A%0Aclass Student %7B%0A    private String name;%0A%0A    public Student(String name) %7B%0A        this.name = name;%0A        StudentGroup.uniqueStudents.add(this.name);%0A    %7D%0A%7D%0A%0Aclass StudentGroup %7B%0A    public static HashSet%3CString%3E uniqueStudents = new HashSet%3C%3E();%0A%7D%0A%0Apublic class UniqueStudentNames %7B%0A    public static void main(String%5B%5D args) %7B%0A        Scanner scanner = new Scanner(System.in);%0A        String input = null;%0A%0A        while (!(input = scanner.nextLine()).toLowerCase().equals(%22end%22)) %7B%0A            Student student = new Student(input);%0A        %7D%0A%0A        System.out.println(StudentGroup.uniqueStudents.size());%0A    %7D%0A%7D%0A

Create 02.UniqueStudentNames.java