1    package nsu.fit.javaperf; 
2     
3    /** 
4     * Deadlock showcase. 
5     * 
6     * Usage: java -cp out/testgcpause.jar nsu.fit.javaperf.TestDeadLock 
7     */ 
8    public class TestDeadLock { 
9     
10       static final Object lock1 = new Object(); 
11    
12       static final Object lock2 = new Object(); 
13    
14       public static void main(String[] args) throws Exception { 
15    
16           new Thread(new Runnable() { 
17               public void run() { 
18                   synchronized (lock2) {  //Lock2 
19                       System.err.println("t1: lock2"); 
20                       try { 
21                           System.err.println("t1: lock2.wait()"); 
22                           lock2.wait(); 
23                       } catch (InterruptedException e) { 
24                           throw new RuntimeException(e); 
25                       } 
26                       synchronized (lock1) { //Lock1 
27                           System.err.println("t1: lock1"); 
28                       } 
29                   } 
30               } 
31           }).start(); 
32    
33           Thread.sleep(100); 
34    
35           new Thread(new Runnable() { 
36               public void run() { 
37                   synchronized (lock1) { 
38                       System.err.println("t2: lock1"); 
39                       synchronized (lock2) { 
40                           System.err.println("t2: lock2.notify"); 
41                           lock2.notify(); 
42                       } 
43                       try { 
44                           Thread.sleep(100); 
45                       } catch (InterruptedException e) { 
46                           throw new RuntimeException(e); 
47                       } 
48                       synchronized (lock2) { 
49                           System.err.println("t2: lock2"); 
50                       } 
51                   } 
52               } 
53           }).start(); 
54       } 
55   } 
56