Problem comparing one line of a file to a different line

Question

Hey guys,
i have a list of emails with a bunch of duplicates and i want to have one of each address. The logic behid the program is it would read in the first email, see if its in the second email list. If the email isnt in the new list it would print it to the new list and go to the second email adress and repeat the prossess.
can you please help me fix this program so it would do this?
Thanks guys
//DuplicateRemover2.java
import java.util.*;
import java.io.*;
public class DuplicateRemover2
     public static void main (String[] args)
          FileOutputStream out;
          PrintStream p = null;
          String fileName = "newemails.txt", fileLine = "", email = "emails.txt";
          Scanner file = null;
          Scanner otherfile = null;
          Scanner s = new Scanner(System.in);
          String listname = " ", scanname = "";
          int count = 0;
          try
               file = new Scanner(new File(email));
               out = new FileOutputStream(fileName, true);
               p = new PrintStream( out );
               otherfile = new Scanner(new File(fileName));
          catch (Exception e)
               System.out.println ("Error writing to file");
               System.exit(-1);
          while (file.hasNext())
          scanname = file.nextLine();
               while (otherfile.hasNext())
               count = 0;
               listname = otherfile.nextLine();
               if (listname.equals(scanname))
               count++;
               if (count == 1)
               p.println (listname);
}

Answer 1

morshed_nsu wrote:
Take an Arraylist object. After reading every email address, check if it is in the arrayList or not. If not then put it into the arrayList and write it to the out file. If it is in the arrayList read the next address.The set (suggested in the previous post) already does this check for you. You can only add something to a set that does not already exist in the set, there is no need to perform this check yourself.