import java.util.List;
import java.util.ArrayList;

public abstract class BankAccount 
{
  
    protected double balance;
    List customerList;
    public static final int MAX_OWNER = 2;
    protected static int numOwner;
   
        
    //* creates a bank account with zero balance
    public BankAccount() 
    {
    	//* initialize the arraylist so it's not null
    	customerList = new ArrayList();
        this.balance = 0;
    }
    
    //* creates a bank account with a customer and an initial balance
    public BankAccount(Customer c, double balance)
    {
        customerList = new ArrayList();
        customerList.add(c);
        this.balance = balance;
    }
    
    //* add a customer
    public void addPerson(Customer customer)
    {
    	customerList.add(customer);
    }
    
	//* returns the number of customers on an account
    public int getNumCustomer()
    {
    	return customerList.size();
    }
    
    //* Obtain a List containing the list of customers owning this bankAccount
    public List getCustomerList()
    {
    	return customerList;
    }
    
    //* returns the account number
    public abstract int getAccountNumber();
    
    //* Deposits money into the bank account
    public void deposit(double amount)
    {
    	this.balance += amount;
    }
    
    //* Withdraws money from a bank account    
    public abstract void withdraw(double amount);
    
    //* returns the current balance of the bank account
    public double getBalance() 
    {
        return this.balance;
    }
    

   	//* obtains information about customers in the bank account
    public String toString() {
        return "BankAccount with balance: $" + this.balance;
    }
    
}