A從櫃檯取，B從ATM取錢

package com.xjh.demo.thread;

public class MoneyTest {

    public static void main(String[] args) {
        Bank bank = new Bank();
        new PersonB(bank,800).start();
        new PersonA(bank,600).start();
        new PersonA(bank,500).start();

    }
}

class Bank {
    static int total = 10000;

    public void station(int num) {
        Bank.total -= num;
        System.out.println("A取出" + num + "元，還剩：" + Bank.total + "元");
    }

    public void atm(int num) {
        Bank.total -= num;
        System.out.println("B取出" + num + "元，還剩：" + Bank.total + "元");
    }
}

class PersonA extends Thread {
    Bank bank;
    int money;

    public PersonA(Bank bank, int money) {
        this.bank = bank;
        this.money = money;
    }


    @Override
    public void run() {
        while (Bank.total >= money) {
            bank.station(money);
            try {
                sleep(100);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

    }
}

class PersonB extends Thread {
    Bank bank;

    int money;

    public PersonB(Bank bank, int money) {
        this.bank = bank;
        this.money = money;
    }

    @Override
    public void run() {
        while (Bank.total >= money) {
            bank.atm(money);
            try {
                sleep(100);
            } catch (Exception e) {

            }
        }
    }
}