自定义死锁

 1 package 多线程练习.锁学习;
 2 
 3 /*
 4    两个线程互相抱对方想要的锁 都在等待对方释放锁 所以卡死了
 5  */
 6 public class 自定义死锁 {
 7     public static void main(String[] args) {
 8         Runnable lileilei = new MakeUp(0, "李蕾蕾");
 9         Runnable hanmeimei = new MakeUp(0, "韩梅梅");
10         new Thread(lileilei).start();
11         new Thread(hanmeimei).start();
12     }
13 }
14 
15 //  口红
16 class LipStick {
17 }
18 
19 // 镜子
20 class Mirror {
21 }
22 
23 class MakeUp implements Runnable {
24 
25     // 保证独一份口红跟镜子
26     static LipStick lipStick = new LipStick();
27     static Mirror mirror = new Mirror();
28     int choice;
29     String grilName;
30 
31     public MakeUp(int choice, String grilName) {
32         this.choice = choice;
33         this.grilName = grilName;
34     }
35 
36     @Override
37     public void run() {
38 
39         if (choice == 0) {
40 
41             synchronized (lipStick) {
42                 System.out.println(grilName + "拿到了口红，接着他要拿镜子");
43                 try {
44                     Thread.sleep(2000);
45                 } catch (InterruptedException e) {
46                     e.printStackTrace();
47                 }
48                 synchronized (mirror) {
49                     System.out.println(grilName + "拿到了镜子");
50                 }
51             }
52         } else {
53 
54             synchronized (mirror) {
55                 System.out.println(grilName + "拿到了镜子，接着他要拿口红");
56                 try {
57                     Thread.sleep(2000);
58                 } catch (InterruptedException e) {
59                     e.printStackTrace();
60                 }
61                 synchronized (lipStick) {
62                     System.out.println(grilName + "拿到了口红");
63                 }
64             }
65         }
66 
67 
68     }
69 }

两个线程互相抱对方想要的锁 都在等待对方释放锁 所以卡死了