小项目--bank4

//用数组实现银行与客户的多重关系

package banking4;

public class Bank {
private Customer[] customers;
private int numberOfCustomer;//用于记录customer个数
public Bank(){
customers=new Customer[5];
}
public void addCustomer(String f,String l){
Customer cust=new Customer(f,l);
customers[numberOfCustomer]=cust;
numberOfCustomer++;
}
public int getNumOfCustomers(){//获取customer个数
return numberOfCustomer;
}
public Customer getCustomer(int index){//返回指定索引位置
return customers[index];
}

}

package testbanking1;
import banking4.*;
public class testbanking4 {
public static void main(String[] args){
Bank bank=new Bank();
bank.addCustomer("吕","青青");
bank.addCustomer("吕", "荣玉");
bank.addCustomer("吕", "跃文");
bank.addCustomer("顾", "怀英");
for(int i=0;i<bank.getNumOfCustomers();i++){
Customer customer=bank.getCustomer(i);
System.out.println("customer:"+i+customer.getFirstName()+customer.getLastName());
}
}
}