java实现简单银行ATM系统
本文实例为大家分享了java实现简单银行ATM系统的具体代码,供大家参考,具体内容如下
#ATM系统
##功能
模拟银行ATM机系统,具有注册、登录功能
用户登录后可实现以下功能:
1)存款 2)取款 3)转账 4)查询 5)退出
##设计思路
首先,要进行ATM机操作应该具有银行卡和ATM,所以我们要设计一个ATM类和Bankcard类,ATM具有存取款等操作,Bankcard用来记录用户存取款等操作后的越,其次因为ATM同时为多个用户服务,所以我们应该识别每张卡,这里增加一个Bank类来记录银行卡个数以及各个用户持有哪些银行卡。
##具体代码
###Bank类
import java.util.Arrays; /** * @author:zl * @Date 22:30 2020/10/9 */ public class Bank { private BankCard[] cards; private int size;// 有效用户个数 private static final int INITSIZE =10; public Bank(){ this(INITSIZE); } public Bank(int num){ cards = new BankCard[num]; } public boolean add(BankCard card){//如果注册过,增加失败 if(contains(card.getID(),card.getPasswd())!=null){ return false; } if(size==cards.length){ cards= Arrays.copyOf(cards,cards.length>>1);//长度不够时进行扩容 } cards[size++] = card;// return true; } public boolean search(int id,int passwd){//查询是否存在这张卡 boolean k=true; for(int i=0;i<size;i++){ if((cards[i].getID()==id)&&(cards[i].getPasswd()==passwd)){ k=true; } else k=false; } return k; } public BankCard contains(int id,int passwd){//查询并返回这张卡 BankCard card=null; for(int i=0;i<size;i++){ if((cards[i].getID()==id)&&(cards[i].getPasswd()==passwd)){ card=cards[i]; break; } } return card; } }
###Bankcard类
import java.util.Scanner; public class BankCard { private int id; private int passwd; public int money=0; public BankCard(int id,int passwd){ this.id=id; this.passwd=passwd; } public int getID(){ return this.id; } public int getPasswd(){ return this.passwd; } /** * 存款 */ public void saveMoney(int money){ this.money+=money; } /** * 取款 */ public boolean withDraw(int money){ boolean flag=false; if(this.money>=money){ this.money-=money; flag=true; } return flag; } /** * 返回余额 * @return */ public int getMoney(){ return this.money; } }
###ATM类
import java.util.Scanner; import src3.BankCard; public class ATM { private Bank bank; private static Scanner scanner; public ATM(){ bank = new Bank(); scanner = new Scanner(System.in); } public void start(){ while (true) { System.out.println("1. 登陆 2.注册 3.关机"); int chioce = scanner.nextInt(); if (chioce == 3) { break; } System.out.println("请输入账号密码"); int id = scanner.nextInt(); int passwd = scanner.nextInt(); BankCard successCard = null; switch (chioce){ case 1: successCard = login(id,passwd); if(successCard != null){ System.out.println("登陆成功"); loginSuccess(successCard); }else{ System.out.println("登陆失败"); } break; case 2: if(regiter(id,passwd)){ System.out.println("注册成功"); }else{ System.out.println("注册失败"); } break; } } } private void loginSuccess(BankCard successCard){ while (true) { System.out.println("1. 存款 2.取款 3.转账 4.余额 5.退卡"); int chioce = scanner.nextInt(); if (chioce == 5) { break; } switch (chioce) { case 1: System.out.println("请输入存款金额"); int money = scanner.nextInt(); successCard.saveMoney(money); System.out.println("存款成功"); break; case 2: System.out.println("请输入取款金额"); money = scanner.nextInt(); if (successCard.withDraw(money)) { System.out.println("取款成功"); } else { System.out.println("取款失败"); } break; case 3: System.out.println("请输入转账金额"); money = scanner.nextInt(); System.out.println("请输入转账用户账号,密码"); int id = scanner.nextInt(); int passwd = scanner.nextInt(); BankCard userCard = bank.contains(id, passwd); if (userCard != null) { if (successCard.withDraw(money)) {// 当前卡取款成功 userCard.saveMoney(money); System.out.println("转账成功"); } else { System.out.println("余额不足"); } } else { System.out.println("没有此用户"); } break; case 4: System.out.println("余额:" + successCard.getMoney()); break; } } } private boolean regiter(int id,int passwd){ BankCard card = new BankCard(id,passwd); return bank.add(card); } private BankCard login(int id,int passwd){ return bank.contains(id,passwd); } }
###测试类
public class TestDemo { public static void main(String[] args) { ATM atm = new ATM(); atm.start(); } }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持我们。
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