java 多线程第二弹-死锁

 1 public class DeadSuo implements Runnable {
 2 
 3     private static Object obj1 = new Object();
 4     
 5     private static Object obj2 = new Object();
 6     
 7     /**
 8      * @param args
 9      */
10     public static void main(String[] args) {
11         Thread t1 =  new Thread(new DeadSuo(), "s1");
12         Thread t2 = new Thread(new DeadSuo(), "s2");
13         
14         t1.start();
15         t2.start();
16 
17     }
18 
19     @Override
20     public void run() {
21         if (Thread.currentThread().getName().equals("s1")) {
22             m1(Thread.currentThread().getName());
23         } else {
24             m2(Thread.currentThread().getName());
25         }
26     }
27 
28     /**
29      * 
30      */
31     private void m1(String name) {
32         System.out.println(name);
33 
34         synchronized (obj1) {
35             try {
36                 Thread.sleep(3000);
37             } catch (Exception e) {
38                 e.printStackTrace();
39             }
40             synchronized (obj2) {
41                 System.out.println(obj2);
42             }
43         }
44         
45         
46     }
47     
48     private void m2(String name) {
49         System.out.println(name);
50 
51         synchronized (obj2) {
52             try {
53                 Thread.sleep(3000);
54             } catch (Exception e) {
55                 e.printStackTrace();
56             }
57             synchronized (obj1) {
58                 System.out.println(obj1);
59             }
60         }
61         
62     }
63 
64 }