java语言程序设计第八版习题10.7 ATM机

一枕雪

于 2013-04-18 15:19:25 发布

阅读量5.6k

点赞数

CC 4.0 BY-SA版权

分类专栏： java

本文链接：https://blog.youkuaiyun.com/koalacoco/article/details/8819187

本文通过创建Account类来实现ATM机的功能。在实现过程中，遇到了两个关键问题：一是静态ArrayList初始化，不初始化会导致NullPointerException；二是处理用户退出时，需将登录状态设为false以退出菜单循环。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

用Account类来模拟一台ATM机

Account类源码：

import java.util.Date;

public class Account {
	private int id = 0;
	private double balance = 0;
	private static double annualInterestRate = 0;
	private Date dateCreated;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public double getBalance() {
		return balance;
	}

	public void setBalance(double balance) {
		this.balance = balance;
	}

	public double getAnnualInterestRate() {
		return annualInterestRate;
	}

	public void setAnnualInterestRate(double annualInterestRate) {
		this.annualInterestRate = annualInterestRate;
	}

	public Date getDateCreated() {
		return dateCreated;
	}


	public Account() {

	}

	public Account(int id, double balance) {
		this.id = id;
		this.balance = balance;
	}

	public static double getMonthlyInterestRate() {

		return annualInterestRate / 12;

	}

	public void withDraw(double money) {
		balance -= money;
	}

	public void d