How do i tell the arraylist that i want to get customer object at index i

Question

hi,
i am using arraylist to add customers... i am trying to get customer info at at the specified index but i keep getting the error message " found object... required Customer"
There is a way to tell the arraylist that the object is Customer . i know this Cause my teacher told us this last week.. but i forgot... so please can u guys plz tell me how to do it.
thanks
package banking.domain;
import java.util.*;
* The Bank class implements the Singleton design pattern, because
* there should be only one bank object.
public class Bank {
   * The class variable that holds the single Bank instance.
  private static final Bank bankInstance = new Bank();
  public static Bank getBank() {
    return bankInstance;
// private static final int MAX_CUSTOMERS = 10;
  private static final double SAVINGS_RATE = 3.5;
  //private Customer[] customers;
  private Customer c;
  private ArrayList customers = new ArrayList();
int i =0;
  private int        numberOfCustomers;
  private Bank() {
   // customers = new Customer[MAX_CUSTOMERS];
    numberOfCustomers = 0;
  public void addCustomer(String f, String l) {
     i = numberOfCustomers++;
    //customers[i] = new Customer(f, l);
    customers.add(i, new Customer(f,l));
  public Customer getCustomer() {
    //return customers[customer_index];
    return customers.get(i);
  public int getNumOfCustomers() {
    return numberOfCustomers;
}

Answer 1

hi,
i think i fixed it.. well the error has gone so i must have.
is this casting.. i saw sumthing similar to this on an article about casting
Customer c = (Customer)customers.get(d);
anyway thanks