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10000new 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;
}@Overridepublic 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;}}