import java.util.Random;
import java.util.Iterator;
import java.util.ArrayList;
import java.util.Collections;

/**
   A class to test the NumberedAccount class.
*/

public class A10
{


   /**
       Traverses the elements of an ArrayList of 
         Numbered Accounts,
         by printing each of them to <code>System.out</code>,
         using the <code>toString</code> method of the
         Numbered Account class.
       @param list the ArrayList
       @throws ClassCastException if there is an element
        of the ArrayList that is not a NumberedAccount
   */
   
   public static void traverse(ArrayList list)             {
      Iterator it = list.iterator();
      while (it.hasNext())
        System.out.println((NumberedAccount) it.next());
      System.out.println();                                }



   /**
      Tests the methods of the NumberedAccount class.
      @param args not used
   */

   public static void main(String[] args)                  {
   
      Random r = new Random(11);
      ArrayList accounts = new ArrayList();
      
      accounts.add(new NumberedAccount(
        "Harry", 1234, 2000));
      accounts.add(new NumberedAccount(
        "Mary", 2345, 3000));
      accounts.add(new NumberedAccount(
        "Barry", 3456, 4000));
     
      System.out.println("sorting the " +
        "collection of accounts so far gives:");    
      ArrayList cloneOfAccounts = 
        (ArrayList) accounts.clone();
      Collections.sort(cloneOfAccounts);
      traverse(cloneOfAccounts);
      System.out.println();
      
      for (int i=1; i<= 10; i++)
        accounts.add(new NumberedAccount(
          "Customer"+i,i,r.nextInt(10000)));

      System.out.println("the unsorted " +
        "collection of accounts is now:");    
      traverse(accounts);
      System.out.println();

      System.out.println("and the sorted " +
        "collection of accounts is now:");    
      Collections.sort(accounts);
      traverse(accounts);
      System.out.println();

      NumberedAccount firstAccount =
        (NumberedAccount) accounts.get(0);
      System.out.println("The first customer" +
        " in alphabetical order");
      System.out.print(" is " + 
        firstAccount.getAccountHolder());
      System.out.print(" with account #" + 
        firstAccount.getAccountNumber());
      System.out.println(" and balance $" + 
        firstAccount.getBalance());                     
        
      firstAccount.deposit(2000);
      System.out.print("After depositing " +
        "$2000, this customer's balance is $");
      System.out.println(firstAccount.getBalance());
      firstAccount.withdraw(1000);
      System.out.print("After withdrawing " +
        "$1000, this customer's balance is $");
      System.out.println(firstAccount.getBalance());
        
        }

}