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這篇文章主要講解了Java項目如何實現模擬ATM機，內容清晰明了，對此有興趣的小伙伴可以學習一下，相信大家閱讀完之后會有幫助。
項目名稱
模擬ATM機
項目描述
簡單實現ATM機功能
代碼實現
測試類
public class Test {
//模擬多功能ATM機
public static void main(String[] args) {
ATM atm = new ATM();
atm.opearte();
}
}主類：實現主方法
public class ATM {
private Bank bank;
public ATM(){
bank = new Bank();
}
private void success(BankCard bankCard) {
while (true) {
System.out.println("請選擇：1、查詢余額，2、取款，3、存款，4、轉賬，5、退卡");
Scanner scanner = new Scanner(System.in);
int choice = scanner.nextInt();
if (choice == 5) {
return;
}
switch (choice) {
case 1:
int money = bank.printf(bankCard);
System.out.println("余額：" + money);
break;
case 2:
System.out.println("請輸入取款金額：");
money = scanner.nextInt();
bankCard.withdraw(money);
break;
case 3:
System.out.println("請輸入存款金額：");
money = scanner.nextInt();
bankCard.deposit(money);
break;
case 4:
System.out.println("請輸入對方賬戶id：");
int id = scanner.nextInt();
BankCard card = bank.transfer(id);
if(card != null){
System.out.println("請輸入轉賬金額：");
money = scanner.nextInt();
if(money <= bankCard.getMoney()){
bankCard.withdraw(money);
card.deposit(money);
}else {
System.out.println("轉賬失敗");
}
}else {
System.out.println("未找到該賬戶");
}
break;
default:
}
}
}
private void login(){ //登錄
System.out.println("請輸入賬號，密碼");
Scanner scanner = new Scanner(System.in);
int id = scanner.nextInt();
int password = scanner.nextInt();
BankCard bankCard = bank.search(id,password);
if(bankCard != null){
System.out.println("登錄成功");
success(bankCard);
}else {
System.out.println("登錄失敗，請注冊");
}
}
private void register(){ //注冊
System.out.println("請輸入賬號，密碼");
Scanner scanner = new Scanner(System.in);
int id = scanner.nextInt();
int password = scanner.nextInt();
BankCard bankCard = bank.search(id,password);
if(bankCard != null){
System.out.println("該賬號已存在，請直接登錄");
}else {
bank.addcard(id,password);
System.out.println("注冊成功");
}
}
public void opearte() {
while (true) {
System.out.println("請選擇：1、登錄，2、注冊，3、退出");
Scanner scanner = new Scanner(System.in);
int choice = scanner.nextInt();
if (choice == 3) {
return;
}
switch (choice) {
case 1:
login();
break;
case 2:
register();
break;
default:
}
}
}
}銀行類：一個銀行對應多個ATM機
public class Bank {
private BankCard[] bankCards;
private final int INITSIZE = 10;
private int size;
public Bank(){
bankCards = new BankCard[INITSIZE];
size = 0;
}
public BankCard search(int id,int password){ //搜索
BankCard[] bankCard = bankCards;
for(int i=0;i<size;i++){
if(bankCards[i].getId() == id && bankCards[i].getPassword() == password){
return bankCard[i];
}
}
return null;
}
public void addcard(int id,int password){ //注冊
BankCard bankCard = new BankCard(id, password);
if (size == bankCards.length){
bankCards = Arrays.copyOf(bankCards,bankCards.length * 2);
}
bankCards[size++] = bankCard;
}
public int printf(BankCard bankCard){ //顯示余額
return bankCard.getMoney();
}
public BankCard transfer(int id){
for(int i=0;i<size;i++){
if(bankCards[i].getId() == id){
return bankCards[i];
}
}
return null;
}
}銀行卡類：不同賬戶的操作
public class BankCard {
private int id;
private int password;
private int money;
private int size = 0;
public BankCard(int id,int password){
this.id = id;
this.password = password;
money = 0;
}
public int getId(){
return id;
}
public int getPassword(){
return password;
}
public int getMoney(){
return money;
}
public void withdraw(int money){ //取款
if(this.money >= money){
this.money -= money;
}else {
System.out.println("取款失敗");
}
}
public void deposit(int money){ //存款
this.money += money;
}
}看完上述內容，是不是對Java項目如何實現模擬ATM機有進一步的了解，如果還想學習更多內容，歡迎關注億速云行業資訊頻道。
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