1 /**
2 * 線程互鎖：線程td1得到obj1的鎖，線程td2得到了obj2的鎖，接著，線程td1在持有obj1的鎖的同時
3 * 企圖得到obj2的鎖，而此時線程td2仍持有obj2的鎖，所以線程td1等待，而線程td2的行為也與線程td1相同
4 * 因此就形成了死鎖
5 */
6 public class Client {
7 public static void main(String[] args) {
8 final Object obj1 = "test1";
9 final Object obj2 = "test2";
10
11 Thread td1 = new Thread(){
12 public void run(){
13 synchronized(obj1){
14 System.out.println("td1得到了obj1的鎖");
15 try {
16 Thread.sleep(1000);
17 } catch (InterruptedException e) {
18 e.printStackTrace();
19 }
20
21 synchronized(obj2){
22 System.out.println("td1企圖得到obj2的鎖");
23
24 try {
25 Thread.sleep(1000);
26 } catch (InterruptedException e) {
27 e.printStackTrace();
28 }
29 }
30 }
31 }
32 };
33
34
35 Thread td2 = new Thread(){
36 public void run(){
37 synchronized(obj2){
38 System.out.println("td2得到了obj2的鎖");
39 try {
40 Thread.sleep(1000);
41 } catch (InterruptedException e) {
42 e.printStackTrace();
43 }
44
45 synchronized(obj1){
46 System.out.println("td2企圖得到obj1的鎖");
47
48 try {
49 Thread.sleep(1000);
50 } catch (InterruptedException e) {
51 e.printStackTrace();
52 }
53 }
54 }
55 }
56 };
57
58 td1.start();
59 td2.start();
60 }
61
62 }