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死锁

作者:互联网

死锁

//死锁:多个线程互相抱着对方需要的资源,然后形成僵持
public class DeadLock {
    public static void main(String[] args) {
        Makeop g1 = new Makeop(0,"灰姑娘");
        Makeop g2 = new Makeop(1,"白雪公主");
        
        g1.start();
        g2.start();
    }
}


//口红
class Lipstick{

}

//镜子
class Mirror{

}

class Makeop extends Thread{

     //需要的资源只有一份,用static来保证
     static Lipstick lipstick = new Lipstick();
     static Mirror mirror = new Mirror();
     
     int choice;//选择
     String girlName;//使用化妆品的人
    
     Makeop(int choice,String girlName){
         this.choice = choice;
         this.girlName = girlName;
         
     }

    @Override
    public void run() {
        //化妆
        try {
            makeop();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

    }
    //化妆,互相持有对方的锁,就是需要拿到对象的资源
    private void makeop() throws InterruptedException {
         if (choice==0){
             synchronized (lipstick){//获得口红的锁
                 System.out.println(this.girlName+"获得口红的锁");
                 Thread.sleep(1000);
                 
                 synchronized (mirror){ //一秒钟后想获得镜子
                     System.out.println(this.girlName+"获得镜子的锁");
                 }
             }
         }else {
             synchronized (mirror) {//获得口红的锁
                 System.out.println(this.girlName + "获得镜子的锁");
                 Thread.sleep(2000);

                 synchronized (lipstick) { //一秒钟后想获得镜子
                     System.out.println(this.girlName + "获得口红的锁");
                 }
             }    
         }
    }
}

标签:girlName,口红,choice,死锁,Makeop,资源
来源: https://www.cnblogs.com/helloxiaolu/p/13323333.html