1. class Resource
   
2. {
   
3. private String name;
   
4. private String sex;
   
5. private boolean flag;
   
6. public void setNameAndSex(String name,String sex)
   
7. {
   
8. this.name = name;
   
9. this.sex = sex;
   
10. }
    
11. public void setFlag(boolean flag)
    
12. {
    
13. this.flag = flag;
    
14. }
    
15. public boolean getFlag()
    
16. {
    
17. return this.flag;
    
18. }
    
19. public void print()
    
20. {
    
21. System.out.println(this.name + "-------" + this.sex);
    
22. }
    
23. }
    
24. class Input implements Runnable{
    
25. private Resource res;
    
26. public Input(Resource res)
    
27. {
    
28. this.res = res;
    
29. }
    
30. private int x = 0;
    
31. public void run()
    
32. {
    
33. while(true)
    
34. {
    
35. synchronized(res)
    
36. {
    
37. if(res.getFlag())
    
38. {
    
39. try{
    
40. res.wait();
    
41. }
    
42. catch(InterruptedException e)
    
43. {
    
44. e.printStackTrace();
    
45. }
    
46. 
    
47. }
    
48. if(x == 0)
    
49. {
    
50. res.setNameAndSex("hezi","boy");
    
51. }
    
52. else
    
53. {
    
54. res.setNameAndSex("莉莉","女孩");
    
55. }
    
56. x = (x + 1)/2;
    
57. res.setFlag(true);
    
58. res.notify();
    
59. }
    
60. }
    
61. }
    
62. }
    
63. class Output implements Runnable
    
64. {
    
65. private Resource res;
    
66. public Output(Resource res)
    
67. {
    
68. this.res = res;
    
69. }
    
70. public void run()
    
71. {
    
72. while(true)
    
73. {
    
74. synchronized(res)
    
75. {
    
76. if(!res.getFlag())
    
77. {
    
78. try{
    
79. res.wait();
    
80. }
    
81. catch(InterruptedException e)
    
82. {
    
83. e.printStackTrace();
    
84. }
    
85. }
    
86. res.print();
    
87. res.setFlag(false);
    
88. res.notify();
    
89. }
    
90. }
    
91. }
    
92. }
    
93. public class SynchronizedDemo01
    
94. {
    
95. public static void main(String[] args)
    
96. {
    
97. Input in = new Input(new Resource());
    
98. Output out = new Output(new Resource());
    
99. Thread t1 = new Thread(in);
    
100. Thread t2 = new Thread(out);
     
101. t1.start();
     
102. t2.start();
     
103. }
     
104. }

复制代码

编译没问题，运行也没有问题，就是没有输出啊。。

睡了一觉醒来自个发现问题了，
Input in = new Input(new Resource());

Output out = new Output(new Resource());

这里两个匿名对象表示的不是同一个对象。。。。
两个线程都在那等着呢