/*
   Chapter 9:  UserList solution
   Programmer: Brad Shedd
   Date:    April 13, 2004
   Filename:   UserList.java
   Purpose: Builds a list of user names
*/

import java.io.*;

public class UserList
{

  public static void main(String[] args) throws IOException
  {
     String str1, str2 = "username";
     int index;
     int initialCapacity = 10;
     BufferedReader dataIn = new BufferedReader(new InputStreamReader(System.in));
     ArrayList users = new ArrayList();

     System.out.print("Enter a user name: ");
     str1 = dataIn.readLine();

      while(str1.length() > 0)
      {
        if(str1 == str2)
            System.out.println("That user name is NOT allowed!");
         else
          {
           if(users.size() == initialCapacity)
           {
                 System.out.println("List is full!");
              System.out.println("Last entry is "+users.get(initialCapacity));
           }
           else
               if(!users.contains(str1))
              {
                 users.add(str1);
                 System.out.println("User \""+str1+"\" added to user list.");
              }
              else
                  System.out.println("User \""+str1+"\" already in user list.");
         }
         System.out.print("\nEnter a user name: ");
         str1 = dataIn.readLine();
     }

    System.out.println("Program complete.");
  }
}

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