多线程详解p16、不安全案例

package syn;
public class BuyTicket {
    public static void main(String[] args) {
        My my = new My();
        new Thread(my,"aa").start();
        new Thread(my,"ab").start();
        new Thread(my,"ac").start();
    }
}
class My implements Runnable{
    int ticket=10;
    boolean flag=true;
    @Override
    public void run() {
        while (flag) {
            try {
                //延迟可以扩大问题的严重性
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            buTicket();
        }
    }
    private  void buTicket(){
            if (ticket <= 0) {
                flag = false;
            return;}
            System.out.println(Thread.currentThread().getName() + "买到了->" + ticket--);
        }
}

package syn;
public class SafeBank {
    public static void main(String[] args) {
        Card card = new Card(100,"结婚基金");
        YinHang yinHang = new YinHang(card,100,"你");
        YinHang yh = new YinHang(card,50,"妻子");
        yh.start();
        yinHang.start();
    }
}
class Card{
     int money;
     String name;
    public Card(int money, String name) {
        this.money = money;
        this.name = name;
    }
}
class YinHang extends Thread{
    Card card;
    int qje;
    int sje;
    public YinHang(Card card, int qje, String name) {
        super(name);
        this.card = card;
        this.qje = qje;
    }
    @Override
    public void run() {
            if (card.money-qje<0) {
                System.out.println("钱不够了");
                return;
            }
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            card.money = card.money - qje;
            System.out.println(Thread.currentThread().getName() + "取了" + qje + "还剩" + card.money);
        }
        }

两个人同时去银行取钱