bank.java

东软JAVA内部资料

package com.neusoft.course.oo;

import java.util.*;

public class Bank {
	private static Bank ins;
	
	private List<Customer> customers;

	private Bank() {
		customers = new ArrayList<Customer>();
	}

	public static Bank getInstance() {
		if (ins == null) {
			ins = new Bank();
		}
		return ins;
	}
	
	public Customer getcustomer(int index) {
		return customers.get(index);
	}

	public boolean addCustomer(Customer customer) {
		boolean result = customers.add(customer);
		return result;		
	}
	
	public int getNumOfCustomer() {
		return customers.size();
	}

	public static void main(String[] args) {
		// TODO Auto-generated method stub

	}

}