三大线程不安全案例之银行取钱案例

package cn.ruhsang.syn;

//不安全的取钱
//两个人去银行取钱,账户
public class UnsafeBank {
    public static void main(String[] args) {
        //账户
        Account account = new Account(100,"结婚基金");

        Drawing you = new Drawing(account,50,"你");
        Drawing girlfriend = new Drawing(account,100,"girlfriend");

        you.start();
        girlfriend.start();
    }
}

//账户
class Account{
    int money;//账户的余额
    String name;//卡名

    public Account(int money, String name) {
        this.money = money;
        this.name = name;
    }
}


//银行:模拟取款
class Drawing extends Thread{
    Account account;//账户
    //取了多少钱
    int drawingMoney;
    //现在手里有多少钱
    int nowMoney;

    public Drawing(Account account,int drawingMoney,String name){
        super(name);
        this.account = account;
        this.drawingMoney = drawingMoney;
    }
    //取钱
    @Override
    public void run() {
        //判断有没有钱
        if(account.money - drawingMoney<0){
            System.out.println(Thread.currentThread().getName()+"钱不够,取不出来");
            return;
        }
        //sleep可以放大问题的发生性
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        //卡内余额 = 余额 - 你取的钱
        account.money = account.money - drawingMoney;
        //你手里的钱
        nowMoney = nowMoney + drawingMoney;

        System.out.println(account.name +"余额为"+account.money);
        //Thread.currentThread().getName() = this.getName()
        System.out.println(this.getName()+"手里的钱"+nowMoney);
    }
}

三大线程不安全案例之银行取钱案例

原文：https://www.cnblogs.com/nigustudent/p/14860191.html