Java实现ATM存取钱代码

源代码如下：

ATM机

import java.util.Scanner;public class ATM {private Bank bankGS;private Bank bankNH;public ATM() {bankGS = new Bank();bankNH = new Bank();}private BankCard searchCard (Bank bank,int id, int passwd){BankCard[] arr = bank.getCards();for (int i = 0; i < bank.getSize(); i++) {if (arr[i].getId() == id && arr[i].getPasswd() == passwd) {return arr[i];}}return null;}private BankCard login (String bankName,int id, int passwd){if (bankName.equals("农业银行")) {return searchCard(bankNH, id, passwd);} else if (bankName.equals("工商银行")) {return searchCard(bankGS, id, passwd);}return null;}public void operator () {while (true) {System.out.println("1.登陆  2.注册  3.退出");Scanner scanner = new Scanner(System.in);int chioce = scanner.nextInt();if (chioce == 3) {return;}System.out.println("请输入银行名：农业银行or工商银行");String bankName = scanner.next();System.out.println("请输入账号：");int id = scanner.nextInt();System.out.println("请输入密码：");int passwd = scanner.nextInt();switch (chioce) {case 1:BankCard successCard = login(bankName, id, passwd);if (successCard != null) {loginSuccessOperator(successCard);} else {System.out.println("登陆失败");}break;case 2:BankCard card = register(bankName, id, passwd);if (card != null) {System.out.println("注册成功");} else {System.out.println("注册失败");}break;}}}private void loginSuccessOperator (BankCard card){while (true) {System.out.println("1.存钱 2.取钱 3.转账 4.查余额 5.退卡");Scanner scanner = new Scanner(System.in);int chioce = scanner.nextInt();if (chioce == 5) {return;}switch (chioce) {case 1:System.out.println("输入存款金额：");int money = scanner.nextInt();card.saveMoney(money);break;case 2:System.out.println("输入取款金额：");money = scanner.nextInt();card.withdraw(money);break;case 3:transfer(card);break;case 4:System.out.println("当前余额：" + card.getMoney());break;}}}private void transfer (BankCard card){Scanner scanner = new Scanner(System.in);System.out.println("请输入转账银行名：");String bankName = scanner.next();System.out.println("请输入转账用户id:");int id = scanner.nextInt();if (bankName.equals("农业银行")) {BankCard[] arr = bankNH.getCards();for (int i = 0; i < bankNH.getSize(); i++) {if (arr[i].getId() == id) {System.out.println("转账金额：");int money = scanner.nextInt();if (money <= card.getMoney()) {card.withdraw(money);arr[i].saveMoney(money);} else {System.out.println("转账失败");}}}}if (bankName.equals("工商银行")) {BankCard[] arr = bankGS.getCards();for (int i = 0; i < bankGS.getSize(); i++) {if (arr[i].getId() == id) {System.out.println("转账金额：");int money = scanner.nextInt();if (money <= card.getMoney()) {card.withdraw(money);arr[i].saveMoney(money);} else {System.out.println("转账失败");}}}}}private BankCard register (String bankName,int id, int passwd){//是否之前存在这张卡BankCard card = new BankCard(id, passwd);if (bankName.equals("农业银行")) {BankCard searchCard = searchCard(bankNH, id, passwd);if (searchCard != null) {System.out.println("注册失败");return null;}bankNH.add(card);}if (bankName.equals("工商银行")) {BankCard searchCard = searchCard(bankGS, id, passwd);if (searchCard != null) {System.out.println("注册失败");return null;}bankGS.add(card);}return card;}}

银行

import java.util.Arrays;public class Bank {private BankCard[]cards;private int size;private final int INITCAPACITY;public Bank(){cards = new BankCard[10];size = 0;INITCAPACITY = 10;}public BankCard[] getCards(){return cards;}private void ensureCapacity(int capacity){if(capacity == cards.length){cards = Arrays.copyOf(cards,cards.length+(cards.length>>1));}}public void add(BankCard card){ensureCapacity(size);cards[size] = card;size++;}public int getSize(){return size;}
}

银行卡的操作

public class BankCard {private int id;private int passwd;private int money;public BankCard(int id,int passwd){this.id =id;this.passwd = passwd;this.money = 0;}public int getId() {return id;}public int getPasswd() {return passwd;}public void saveMoney(int money){this.money+=money;}public void withdraw(int money){if(this.money >= money) {this.money -= money;}else{System.out.println("取钱失败");}}public int getMoney(){return money;}
}

测试类

public class main {public static void main(String[] args) {ATM atm = new ATM();atm.operator();}
}

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Java实现ATM存取钱代码

源代码如下：

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