线程安全问题 的小案例

package Thread_api_test;
 
 
 
public class ThreadSafety {
    //模拟线程安全问题
    public static void main(String[] args) {
        //1:创建一个账户对象 代表两个人的共享账户
        Account acc=new Account("ICBC",10000);
        //创建两个线程 分别两个人 再去同一个账户里取钱10000
 
 
        new DrawThread(acc,"第一个人").start(); //第1个人
        new DrawThread(acc,"第二个人").start(); //第2个人
 
    }
}

package Thread_api_test;
 
public class DrawThread extends Thread {
 
private Account acc;
public DrawThread(Account acc,String name){
    super(name);
    this.acc=acc;
}
 
    @Override
    public void run() {
        super.run();
        //取钱
        acc.drawMoney(10000);
    }
}

package Thread_api_test;
 
public class Account {
    private String carId;  //卡号
    private double money ;//余额
 
    public Account() {
    }
 
    public Account(String carId, double money) {
        this.carId = carId;
        this.money = money;
 
    }
    public void drawMoney(double mony) {
        //先知道那个人来取钱
      String name= Thread.currentThread().getName();
      if (this.money>=mony){
          System.out.println(name+"来取钱"+mony+"成功！");
          this.money-=mony;
          System.out.println(name+"来取钱后：剩余的“："+this.money);
      }else{
          System.out.println(name+"来取钱：余额不足~~!");
      }
    }
 
 
 
 
    public String getCarId() {
        return carId;
    }
 
    public void setCarId(String carId) {
        this.carId = carId;
    }
 
    public double getMoney() {
        return money;
    }
 
    public void setMoney(double money) {
        this.money = money;
    }
 
 
}