java银行排队系统源码（java排队叫号系统源码）
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JAVA 简单银行系统的代码
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class AccountDemo {
public static double MONEY = 0;// 初始化金额是100元。
public static void main(String[] args) {
final String USER_NAME = "zhangsan";// 用户名
final String PASSWORD = "123456";// 密码
while (true) {
System.out.print("请输入用户名java银行排队系统源码：");
String user_name = getString();
System.out.print("请输入密码：");
String password = getString();
if (user_name != null user_name.equals(USER_NAME)
password != null password.equals(PASSWORD)) {
System.out.println("登陆成功java银行排队系统源码！你要干什么？");
while (true) {
System.out.println("1：存款");
System.out.println("2：取款");
System.out.println("3：查询余额");
System.out.println("q：退出程序");
System.out.print("请选择：");
String userIn = getString();
int in = 0;
if (userIn != null userIn.equals("1")) {
in = Integer.parseInt(userIn);
} else if (userIn != null userIn.equals("2")) {
in = Integer.parseInt(userIn);
} else if (userIn != null userIn.equals("3")) {
in = Integer.parseInt(userIn);
} else if (userIn != null
userIn.trim().toUpperCase().equals("Q")) {
in = 4;
} else {
System.out.println("你输入java银行排队系统源码的指令不正确！请重新输入。");
continue;
}
switch (in) {
case 1:
double add_money = 0;
while (true) {
System.out.print("请输入你要存入的金额：");
try {
add_money = Double.parseDouble(getString());
} catch (Exception e) {
System.out.println("金额输入不正确！");
continue;
}
break;
}
MONEY += add_money;
System.out.println("存入的金额是" + add_money
+ "\r\n请选择你要的操作：");
break;
case 2:
double money = 0;
while (true) {
System.out.print("请输入你要取出的金额：");
try {
money = Double.parseDouble(getString());
} catch (Exception e) {
System.out.println("金额输入不正确！");
continue;
}
if (money MONEY) {
System.out.println("取出的金额大于现有存款java银行排队系统源码，请重新输入要取出的金额！");
continue;
}
break;
}
MONEY -= money;
System.out.println("取出的金额是" + money + "\r\n请选择你要的操作：");
break;
case 3:
System.out.println("你的余额是：" + MONEY + "\r\n请选择你要的操作：");
break;
case 4:
System.out.println("程序退出！");
return;
}
}
} else {
System.out.println("错误：用户名与密码不匹配！\r\n");
System.out.println("按任意键:重新输入用户名和密码。");
System.out.println("q:退出程序。");
System.out.print("请选择:");
String in = getString();
if (in.trim().toUpperCase().equals("Q")) {
break;
}
}
}
}
public static String getString() {
String str = null;
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
try {
str = br.readLine();
} catch (IOException e) {
e.printStackTrace();
}
return str;
}
}
用多线程实现银行排队功能java
package com.lw;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public class ReentrantLockDemo implements Runnable {
private int number = 0;// 创建一个变量
private Lock lock = new ReentrantLock();// 创建重入锁对象
@Override
public void run() {
lock.lock();// 打开锁
try {
for (int i = 0; i 5; i++) {
try {
Thread.sleep(100);// 线程休眠0.1秒
} catch (InterruptedException e) {
e.printStackTrace();
}
// 输出当前线程java银行排队系统源码的名称和numberjava银行排队系统源码的值java银行排队系统源码，每次循环之后numberjava银行排队系统源码的值都会加一
System.out.println(Thread.currentThread().getName() + ": "
+ number++);
}
} finally {
lock.unlock();// 释放锁
}
}
public static void main(String[] args) {
ReentrantLockDemo run = new ReentrantLockDemo();// 获得ReentrantLockDemo对象
Thread thread1 = new Thread(run);// 创建线程1
Thread thread2 = new Thread(run);// 创建线程2
thread1.start();// 运行线程1
thread2.start();// 运行线程2
}
}
Java中应用线程银行排队系统
//您可以使用重入锁实现排队。
package com.lw;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public class ReentrantLockDemo implements Runnable {
private int number = 0;// 创建一个变量
private Lock lock = new ReentrantLock();// 创建重入锁对象
@Override
public void run() {
lock.lock();// 打开锁
try {
for (int i = 0; i 5; i++) {
try {
Thread.sleep(100);// 线程休眠0.1秒
} catch (InterruptedException e) {
e.printStackTrace();
}
// 输出当前线程java银行排队系统源码的名称和number的值java银行排队系统源码，每次循环之后number的值都会加一
System.out.println(Thread.currentThread().getName() + ": "
+ number++);
}
} finally {
lock.unlock();// 释放锁
}
}
public static void main(String[] args) {
ReentrantLockDemo run = new ReentrantLockDemo();// 获得ReentrantLockDemo对象
Thread thread1 = new Thread(run);// 创建线程1
Thread thread2 = new Thread(run);// 创建线程2
thread1.start();// 运行线程1
thread2.start();// 运行线程2
}
}
