Write a java program which reads a series of first names & stores them in linked list. The program should not allow duplicate names and it should also allow the user to search first name.

import java.util.*;

import java.io.*;


class  TestFirstName

{

            public static void main(String[] args)

            {

                        int n;

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

                        LinkedList a1=new LinkedList();

                        try

                        {          

                                    System.out.print("How many name you want to accept:");

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

                                    for(int j=0;j

                                    {

                                                String nm;

                                                System.out.print("Enter Name "+(j+1)+":");

                                                nm=br.readLine();

                                                Iterator it =a1.iterator();

                                                int f=1;

                                                while(it.hasNext())

                                                {

                                                            if(nm.equals(it.next()))

                                                            {

                                                                        System.out.println("No Duplicates Allowed....");

                                                                        j--;

                                                                        f=0;

                                                                        break;

                                                            }

                                                            else

                                                            {

                                                                        f=1;

                                                            }

                                                }

                                                if(f==1)

                                                            a1.add(nm);

                                    }

                        }

                        catch (Exception e)

                        {

                                    System.out.println(e);

                        }

                        Iterator it=a1.iterator();

                        System.out.print("Enter name to Search:");

                        String nm="";

                        try{

                                    nm=br.readLine();

                        }

                        catch (Exception e)

                        {

                                    System.out.println(e);

                        }


                        int f=1;

                        while(it.hasNext())

                        {

                                    if(nm.equals(it.next()))

                                    {

                                                f=0;

                                                System.out.println("Record Found....");

                                                break;

                                    }

                                    else

                                    {

                                                f=1;

                                    }

                        }

                        if(f==1)

                        {

                                                System.out.println("Record Not Found....");

                        }

            }

}