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
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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
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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
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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
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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。
原文链接：https://blog.csdn.net/m0_49449205/article/details/109789610