线程同步——死锁问题

 1 public class Demo {
 2     public static void main(String[] args) {
 3         String s1 = "匕首";
 4         String s2 = "刺杀";
 5         new Thread() {
 6 
 7             @Override
 8             public void run() {
 9                 while (true) {
10                     synchronized (s1) {
11                         System.out.println(this.getName() + "拿到匕首" + "准备刺杀");
12                         synchronized (s2) {
13                             System.out.println(this.getName() + "正在刺杀");
14                         }
15                     }
16                 }
17             }
18             
19         }.start();
20         
21         new Thread() {
22 
23             @Override
24             public void run() {
25                 while (true) {
26                     synchronized (s2) {
27                         System.out.println(this.getName() + "拿到匕首" + "准备刺杀");
28                         synchronized (s1) {
29                             System.out.println(this.getName() + "正在刺杀");
30                         }
31                     }
32                 }
33             }
34             
35         }.start();
36     }
37 }