编写一个ATM系统（账号和密码自己定义，转账账户自己定义，时间可以不用展示出来，并且用方法的方式实现）效果如图所示：
package Bank;
/**
* @Author: AxinGzZz
* @Date: 2021/1/16 18:46
*/
public class Account {
//账户账号
//账户密码
//余额
private String id = "lx";
private String id2 = "yy";
private String password = "123456";
private double balance = 500;
private double balance1 = 700;
int j =4;
//登录入口及功能实现
public void regist(){
}
//查询余额功能
public void baquiry(){
}
//存款功能
public void deposit(){
}
//取款功能
public void withdrawal(){
}
//转账功能
public void transferAccounts(){
}
//修改密码
public void changePassword(){
}
//退出
public void exit(){
}
//get,set方法访问封装数据
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public double getBalance() {
return balance;
}
public void setBalance(double balance) {
this.balance = balance;
}
public String getId2() {
return id2;
}
public void setId2(String id2) {
this.id2 = id2;
}
public double getBalance1() {
return balance1;
}
public void setBalance1(double balance1) {
this.balance1 = balance1;
}
//有参构造方法
public Account(String id, String password, double balance ,double balance1) {
this.id = id;
this.password = password;
this.balance = balance;
this.balance1 = balance1;
}
//无参构造方法
public Account() {
}
//重写toString
@Override
public String toString() {
return "Account{" +
"id='" + id + '\'' +
", password='" + password + '\'' +
", balance=" + balance +
'}';
}
}
package Bank;
import java.time.LocalDate;
import java.util.Calendar;
import java.util.Scanner;
/**
* @Author: AxinGzZz
* @Date: 2021/1/16 22:49
*/
public class AtmDemo extends Account {
@Override
public void regist() {
LocalDate localDate = LocalDate.now();
//获取年份
int year = localDate.getYear();
//获取月
int month = localDate.getMonthValue();
//获取日
int day = localDate.getDayOfMonth();
Calendar calendar = Calendar.getInstance();
int hour = calendar.get(Calendar.HOUR_OF_DAY);
//获取分钟
int minute = calendar.get(Calendar.MINUTE);
//获取秒
int second = calendar.get(Calendar.SECOND);
System.out.println("----------------------");
System.out.println("####欢迎来到实训银行####");
System.out.println("####请按照功能菜单进行操作####");
System.out.println("请输入您的账号：");
Scanner scanner = new Scanner(System.in);
String id1 = scanner.next();
System.out.println("请输入您的密码：");
String password1 = scanner.next();
if (getId().equals(id1) && getPassword().equals(password1)) {
System.out.println("登录成功! 当前余额" + getBalance() + "元"+" "+"登录时间："+year+"-"+month+"-"+day+":"+hour+":"+minute+":"+second);
while (true) {
System.out.println("-----------------------");
System.out.println("####请按照菜单选择功能####");
System.out.println("————————————————————————");
System.out.println("1.余额查询 2.存款 3.取款 4.转账 5.修改密码 0.退出");
Scanner scanner1 = new Scanner(System.in);
int input = scanner1.nextInt();
switch (input) {
case 1:
baquiry();
break;
case 2:
deposit();
break;
case 3:
withdrawal();
break;
case 4:
transferAccounts();
break;
case 5:
changePassword();
break;
case 0:
exit();
break;
}
}
} else {
System.out.println("账户名称或密码不对，请你重新输入，你还剩" + j + "次机会");
j--;
if (j < 0) {
System.out.println("账户名称或密码情况，您已经输错5次了。请联系银行工作人员");
scanner.close();
} else {
regist();
}
}
}
//重写查询余额方法
@Override
public void baquiry() {
System.out.println("当前的余额为：");
System.out.println(getBalance() + "元");
}
//重写存款方法
@Override
public void deposit() {
Scanner scanner = new Scanner(System.in);
System.out.println("请输入存款金额：");
double dep = scanner.nextInt();
if (dep % 100 != 0) {
System.out.println("存款必须是100的倍数");
} else {
//计算存款金额
dep += getBalance();
//利用set方法更新余额
setBalance(dep);
System.out.println("存款成功，账户余额为：" + dep + "元");
}
}
//重写取款方法
@Override
public void withdrawal() {
Scanner scanner = new Scanner(System.in);
System.out.println("请输入取款金额：");
double dra = scanner.nextInt();
if (dra % 100 != 0) {
System.out.println("取款必须是100的倍数");
} else {
//判断取款是否大与余额
if (dra > getBalance()) {
System.out.println("你的余额不足");
} else {
//利用set方法更新余额
dra = getBalance() - dra;
setBalance(dra);
System.out.println("取款成功,账户余额为：：" + dra + "元");
}
}
}
//重写转账方法
@Override
public void transferAccounts() {
Scanner scanner = new Scanner(System.in);
System.out.println("请输入转账账户：");
String trAcc = scanner.next();
if (trAcc.equals(getId2())) {
System.out.println("请输入转账金额：");
Scanner scanner1 = new Scanner(System.in);
int sum = scanner1.nextInt();
//判断转账金额是否大于存款
if (sum % 100 == 0 && sum < getBalance()) {
double sum0 = getBalance() - sum;
//利用set方法更新自己账户余额
setBalance(sum0);
double sum1 = sum;
sum1 += getBalance1();
//利用set方法更新对方账户余额
setBalance1(sum1);
System.out.println("转账成功，账户余额为：" + sum0 + "对方账户余额为：" + sum1);
} else {
System.out.println("您的余额不足");
}
} else {
System.out.println("您输入的账户不存在");
}
}
//重写修改密码方法
@Override
public void changePassword() {
System.out.println("请输入当前密码：");
Scanner scanner = new Scanner(System.in);
String cp = scanner.next();
if (cp.equals(getPassword())) {
Scanner scanner2 = new Scanner(System.in);
System.out.println("请输入新密码：");
String cp2 = scanner2.next();
System.out.println("请再次输入新密码:");
;
Scanner scanner1 = new Scanner(System.in);
String cp1 = scanner1.next();
if (cp1.equals(cp2)) {
cp = cp1;
setPassword(cp);
System.out.println("修改密码成功,请重新登录");
regist();
} else {
System.out.println("您输入的密码不一致！");
changePassword();
}
} else {
System.out.println("您当前输入的密码不对");
}
}
//重写退出方法
@Override
public void exit() {
System.out.println("您确定要退出系统？是则按Y,否则按N");
Scanner scanner = new Scanner(System.in);
String input = scanner.next();
String input1 = "Y";
if (input.equals(input1)) {
System.out.println("您已退出系统，是否再次登录？是则按Y，否则按N");
Scanner scanner1 = new Scanner(System.in);
String input2 = scanner1.next();
String input3 = "Y";
if (input2.equals(input3)) {
regist();
} else {
System.out.println("您已退出系统！");
System.exit(0);
}
}
}
}
package Bank;
/**
* @Author: AxinGzZz
* @Date: 2021/1/16 19:32
*/
public class BankDemo {
public static void main(String[] args) {
Account account = new AtmDemo();
account.regist();
}
}
效果图
