Java多線程總結三：sleep()、join()、interrupt()示例

這是一個來自《Java編程思想》上的示例。 下載見 http://www.linuxidc.com/Linux/2011-11/48069.htm

1. package demo.thread;
3. /**
4. *sleep()是靜態方法，是屬於類的，作用是讓當前線程阻塞
5. *join()是使線程同步，如在某個線程裡調用t.join()表示t線程執行完再執行當前線程
6. *interrupt()給線程設定一個標志表示該線程已被中斷，但在異常捕獲時將清理這個標志
7. *所以在catch子句中，該標志為false
8. */
9. public class SleepJoinDemo {
10. public static void main(String[] args) {
11. Sleeper sleep1 = new Sleeper("sleep1", 1500);
12. Sleeper sleep2 = new Sleeper("sleep2", 1500);
13. Joiner join1 = new Joiner("join1", sleep1);
14. Joiner join2 = new Joiner("join2", sleep1);
15. sleep2.interrupt();
16. }
17. }
19. class Sleeper extends Thread {
20. // 可以傳參設定睡眠時間
21. private int sleepTime;
23. public Sleeper(String name, int sleepTime) {
24. super(name);
25. this.sleepTime = sleepTime;
26. start();// 在構造方法中啟動
27. }
29. @Override
30. public void run() {
31. try {
32. sleep(sleepTime);
33. } catch (InterruptedException e) {
34. System.out.println(getName() + " was interrupted.\n"
35. + "isInterrupted():" + isInterrupted());
36. return;
37. }
38. System.out.println(getName() + " has awakened");
39. }
40. }
42. class Joiner extends Thread {
43. private Sleeper sleeper;
45. public Joiner(String name, Sleeper sleeper) {
46. super(name);
47. this.sleeper = sleeper;
48. start();
49. }
51. public void run() {
52. try {
53. sleeper.join();//合並，異步變同步
54. } catch (InterruptedException e) {
55. System.out.println("interrupted");
56. }
57. System.out.println(getName() + " join completed");
58. }
59. }