Write a java program to read n Empoyee names from user, store them into the Array List collection. The program should not allow duplicate names. Display the names in Ascending order.

import java.util.*;

import java.io.*;

public class EmployeeArray

{

public static void main(String args[])throws Exception

{

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

ArrayList a = new ArrayList();

System.out.println("\nEnter number of Employee : ");

int n = Integer.parseInt(br.readLine());

System.out.println("\nEnter name : ");

for(int i = 1; i <= n; i++)

{

a.add(br.readLine());

}

TreeSet tr = new TreeSet(a);

System.out.println("Sorted name are : "+tr);

}

}