1. package test11;
   
2. package test11;
   
3. /*题目1：编写一个多线程程序，每隔30ms输出线程的名字（线程至少3个以上）【多线程】。
   
4. 
   
5. */
   
6. public class ThreadTest {
   
7. public static void main(String[] args) {
   
8. TimeMillis tm=new TimeMillis();
   
9. MyThread mt1=new MyThread(tm);
   
10. MyThread mt2=new MyThread(tm);
    
11. MyThread mt3=new MyThread(tm);
    
12. MyThread mt4=new MyThread(tm);
    
13. MyThread mt5=new MyThread(tm);
    
14. 
    
15. new Thread(mt1).start();
    
16. new Thread(mt2).start();
    
17. new Thread(mt3).start();
    
18. new Thread(mt4).start();
    
19. new Thread(mt5).start();
    
20. }
    
21. }
    
22. 
    
23. import java.util.concurrent.locks.Condition;
    
24. import java.util.concurrent.locks.Lock;
    
25. import java.util.concurrent.locks.ReentrantLock;
    
26. 
    
27. public class TimeMillis {
    
28. //创建对象时初始化属性t，获取系统时间 要使用同步
    
29. private long t=System.currentTimeMillis();
    
30. private int count=0;
    
31. private Lock lock=new ReentrantLock();
    
32. private Condition con=lock.newCondition();
    
33. private boolean flag;
    
34. private int x=1;
    
35. void getTime() throws InterruptedException{
    
36. lock.lock();
    
37. try{
    
38. while(flag){
    
39. con.await();
    
40. }
    
41. flag=true;
    
42. //线程执行时获取系统时间
    
43. long t1= System.currentTimeMillis();
    
44. //判断线程执行时的系统时间和对象初始化的系统时间差值是否是30的整数倍，是就打印线程名
    
45. if(((t1-t)/30)>=x){
    
46. x++;
    
47. count++;
    
48. System.out.println(t1);
    
49. System.out.println(Thread.currentThread().getName()+"第"+count+"次"+(t1-t));
    
50. }
    
51. flag=false;
    
52. con.signal();
    
53. }finally{
    
54. lock.unlock();
    
55. }
    
56. 
    
57. }
    
58. }
    
59. package test11;
    
60. 
    
61. public class MyThread implements Runnable {
    
62. private TimeMillis tm;
    
63. MyThread(TimeMillis tm){
    
64. this.tm=tm;
    
65. }
    
66. //线程的执行语句
    
67. public void run() {
    
68. int x=0;
    
69. while(x<10000){
    
70. x++;
    
71. try {
    
72. tm.getTime();
    
73. } catch (Exception e) {
    
74. System.out.println("线程异常中断");
    
75. }
    
76. }
    
77. }
    
78. }
    

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1. package test11;
   
2. package test11;
   
3. /*题目1：编写一个多线程程序，每隔30ms输出线程的名字（线程至少3个以上）【多线程】。
   
4. 
   
5. */
   
6. public class ThreadTest {
   
7. public static void main(String[] args) {
   
8. TimeMillis tm=new TimeMillis();
   
9. MyThread mt1=new MyThread(tm);
   
10. MyThread mt2=new MyThread(tm);
    
11. MyThread mt3=new MyThread(tm);
    
12. MyThread mt4=new MyThread(tm);
    
13. MyThread mt5=new MyThread(tm);
    
14. 
    
15. new Thread(mt1).start();
    
16. new Thread(mt2).start();
    
17. new Thread(mt3).start();
    
18. new Thread(mt4).start();
    
19. new Thread(mt5).start();
    
20. }
    
21. }
    
22. 
    
23. import java.util.concurrent.locks.Condition;
    
24. import java.util.concurrent.locks.Lock;
    
25. import java.util.concurrent.locks.ReentrantLock;
    
26. 
    
27. public class TimeMillis {
    
28. //创建对象时初始化属性t，获取系统时间 要使用同步
    
29. private long t=System.currentTimeMillis();
    
30. private int count=0;
    
31. private Lock lock=new ReentrantLock();
    
32. private Condition con=lock.newCondition();
    
33. private boolean flag;
    
34. private int x=1;
    
35. void getTime() throws InterruptedException{
    
36. lock.lock();
    
37. try{
    
38. while(flag){
    
39. con.await();
    
40. }
    
41. flag=true;
    
42. //线程执行时获取系统时间
    
43. long t1= System.currentTimeMillis();
    
44. //判断线程执行时的系统时间和对象初始化的系统时间差值是否是30的整数倍，是就打印线程名
    
45. if(((t1-t)/30)>=x){
    
46. x++;
    
47. count++;
    
48. System.out.println(t1);
    
49. System.out.println(Thread.currentThread().getName()+"第"+count+"次"+(t1-t));
    
50. }
    
51. flag=false;
    
52. con.signal();
    
53. }finally{
    
54. lock.unlock();
    
55. }
    
56. 
    
57. }
    
58. }
    
59. package test11;
    
60. 
    
61. public class MyThread implements Runnable {
    
62. private TimeMillis tm;
    
63. MyThread(TimeMillis tm){
    
64. this.tm=tm;
    
65. }
    
66. //线程的执行语句
    
67. public void run() {
    
68. int x=0;
    
69. while(x<10000){
    
70. x++;
    
71. try {
    
72. tm.getTime();
    
73. } catch (Exception e) {
    
74. System.out.println("线程异常中断");
    
75. }
    
76. }
    
77. }
    
78. }
    

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