「java银行卡存取款系统」用java写银行存取款系统
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如何用Java编写模拟ATM取款机的程序
import java.io.IOException;
/**
* ATM机类
*
* 查看余额
*
* 取款
*
* 存款
*
* 退出系统
*
*
*
*/
public class ATM {
static double yue = 1200.00;
public static void main(String[] arg) {
ATM localTest1 = new ATM();
localTest1.ATM_Operate();
}
/**
* ATM机的操作
*/
private void ATM_Operate() {
System.out.println("欢迎使用中国工商银行ATM取款机");
System.out.println("1、查看余额 2、取款");
System.out.println("3、存款 0、退出");
System.out.print("请输入您需要的服务:");
byte[] buffer = new byte[512];
try {
int count = System.in.read(buffer);// 返回实际读取的字节数
System.out.print("您输入的是:");
for (int i = 0; i count; i++) {
System.out.print("" + (char) buffer[i]);
}
if ((char) buffer[0] == '1') {
// 查看余额
System.out.println("您的余额是：￥" + yue + "元");
System.out.println();
ATM_Operate();
} else if ((char) buffer[0] == '2') {
// 取款
withdrawal();
System.out.println();
ATM_Operate();
} else if ((char) buffer[0] == '3') {
// 存款
deposit();
System.out.println();
ATM_Operate();
} else if ((char) buffer[0] == '0') {
// 退出
System.out.println("您已经成功退出系统，谢谢你的使用");
System.exit(0);
} else {
System.out.println("输入不合法，请重新输入");
System.out.println();
ATM_Operate();
}
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 取款
*
* @throws IOException
*/
private void withdrawal() throws IOException {
byte[] buffer = new byte[512];
System.out.print("请输入您要取出的金额:￥");
int count2 = System.in.read(buffer);// 返回实际读取的字节数
System.out.print("您输入的金额是:");
for (int i = 0; i count2 - 1; i++) {
System.out.print("" + (char) buffer[i]);
}
System.out.println();
// 字符0 ~ 9对应ASCII值48 ~ 57
boolean flag = false;
for (int i = 0; i count2 - 1; i++) {
if ((char) buffer[i] 47 (char) buffer[i] 58) {
if (i == count2 - 2) {
flag = true;
}
} else {
// 输入的字符不是数值
System.out.println("输入不合法，请重新输入");
withdrawal();
break;
}
}
System.out.println();
if (flag) {
System.out.print("您已成功取出￥:");
String num = "";
for (int i = 0; i count2 - 1; i++) {
System.out.print("" + (char) buffer[i]);
num += (char) buffer[i];
}
yue -= Double.valueOf(num);
System.out.print("，现在余额￥:" + yue);
}
}
/**
* 存款
*
* @throws IOException
*/
private void deposit() throws IOException {
byte[] buffer = new byte[512];
System.out.print("请输入您要存入的金额:￥");
int count2 = System.in.read(buffer);// 返回实际读取的字节数
System.out.print("您输入的金额是:");
for (int i = 0; i count2 - 1; i++) {
System.out.print("" + (char) buffer[i]);
}
System.out.println();
// 字符0 ~ 9对应ASCII值48 ~ 57
boolean flag = false;
for (int i = 0; i count2 - 1; i++) {
if ((char) buffer[i] 47 (char) buffer[i] 58) {
if (i == count2 - 2) {
flag = true;
}
} else {
// 输入的字符不是数值
System.out.println("输入不合法，请重新输入");
withdrawal();
break;
}
}
System.out.println();
if (flag) {
System.out.print("您已成功存入￥:");
String num = "";
for (int i = 0; i count2 - 1; i++) {
System.out.print("" + (char) buffer[i]);
num += (char) buffer[i];
}
yue += Double.valueOf(num);
System.out.print("，现在余额￥:" + yue);
}
}
}
使用JAVA编写一个简单的银行存取款程序
package com.lw.thread;
/*
银行账户类Account（不能透支），
包含账号id（10~16位数字），密码password（6位数字），户主姓名name，余额balence
*/
public class Account {
private String id;
private int password;
private String name;
private double balence;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public int getPassword() {
return password;
}
public void setPassword(int password) {
this.password = password;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getBalence() {
return balence;
}
public void setBalence(double balence) {
this.balence = balence;
}
/*
* 默认构造账户信息为：1111111111111111,666666，钱三多，888888.88。
*/
public Account() {
super();
this.id = "1111111111111111";
this.password = 666666;
this.name = "钱三多";
this.balence = 888888.88;
}
/*
* 另一个构造方法带4个参数分别初始化4个属性（带数据有效性验证）。
*/
public Account(String id, int password, String name, double balence) {
this.id = id;
this.password = password;
this.name = name;
this.balence = balence;
}
/*
* 查询余额
*/
public static double selectMoney(Account account) {
return account.getBalence();
}
/*
* 存钱
*/
public static String setMoney(Account account, double balence) {
if (balence 0) {
return "存钱失败，请正确放入！";
}
double d = balence + account.getBalence();
account.setBalence(d);
return "您存入了" + balence + "元，现账户余额为+" + d;
}
/*
* 取钱
*/
public static String getMoney(Account account, double balence) {
double d = account.getBalence();
if (balence d) {
return "您的余额不足！";
}
account.setBalence(d - balence);
return "您取出了" + balence + "元，现账户余额为+" + account.getBalence();
}
}
JAVA编写银行账户程序摸拟银行账户的存\取款操作
public class ATM {
public static void main(String[] args) {
// 开立帐号
Account account = new Account();
// 在 account 中存 10,000 元
account.setBalance(10000);
// 检查 account 中的存款
System.out.println("帐户原始金额 : " + account.getBalance() + " 元");
// 小明, 小华与小英一起对 account 进行提款的动作
WithDraw s1 = new WithDraw("小明", account, 5000); // 小明 在 account 中提 5000 元
WithDraw s2 = new WithDraw("小华", account, 2000); // 小华 在 account 中提 2000 元
WithDraw s3 = new WithDraw("小英", account, 4000); // 小英 在 account 中提 4000 元
s1.start();
s2.start();
s3.start();
}
}
//帐户
class Account {
private int balance; // 帐户馀额
public int getBalance() { // 取得帐户馀额
return balance;
}
public void setBalance(int money) { // 设定帐户馀额
balance = money;
}
// 提款方法
public void withDraw(Account account, int withdrawMoney) {
String tName = Thread.currentThread().getName(); // tName=提款人
System.out.println(tName + " 开始提款 ... ");
boolean withDrawStatus; // 提款状态 说明:false=提款失败, true=提款成功
synchronized(ATM.class) {
int tmpBalabce = account.getBalance(); // 取得最新帐户馀额
//用 for-loop 模拟提款时系统所花的时间
for(double delay=0;delay99999999;delay++) {
// ... 提款进行中 ...
}
tmpBalabce = tmpBalabce - withdrawMoney; // 最新帐户馀额 - 欲提款金额 (用来判断是否馀额足够的依据)
if (tmpBalabce 0) { // 判断是否馀额足够
withDrawStatus = false;
System.out.println("....................");
System.out.println(" 帐户馀额不足！");
System.out.println("....................");
} else {
withDrawStatus = true;
account.setBalance(tmpBalabce); // 回存account最後剩馀金额
}
}
System.out.println(tName + "的交易单:");
System.out.println("\t欲提款金额：" + withdrawMoney + "元");
System.out.println("\t帐户馀额：" + account.getBalance());
if(withDrawStatus == true){
System.out.println(tName + " 完成提款 ... ");
} else {
System.out.println(tName + " 提款失败 ... ");
}
System.out.println("-------------------------------");
}
}
// 提款类别
class WithDraw extends Thread {
private Account account; // 帐号
private int withdrawMoney; // 欲提款的金额
// tName:执行绪名称, account:Account物件名称, withdrawMoney:欲提款金额
public WithDraw(String tName, Account account, int withdrawMoney) {
setName(tName);
this.account = account;
this.withdrawMoney= withdrawMoney;
}
public void run() {
// 执行提款动作(account:帐号, withdrawMoney 欲提款金额)
account.withDraw(account, withdrawMoney); // 执行提款动作
}
}
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发布于：2022-11-27，除非注明，否则均为原创文章，转载请注明出处。