设为首页收藏本站
开启辅助访问

在路上

 找回密码
 立即注册
在路上 › 站点首页 ›学习 › 查看内容

Java多线程中关于join方法的使用实例解析

2017-3-7 12:50| 发布者: zhangjf| 查看: 1066| 评论: 0

摘要: 先上代码 新建一个Thread,代码如下: package com.thread.test;public class MyThread extends Thread { private String name; public MyThread(String name) { this.name = name; } @Override public void r ...

先上代码

新建一个Thread,代码如下:

  2. package com.thread.test;
  3. public class MyThread extends Thread {
  4. private String name;
  5. public MyThread(String name) {
  6. this.name = name;
  7. }
  8. @Override
  9. public void run() {
  10. for (int i = 0; i < 100; i++) {
  11. System.out.println(name+"["+i+"]");
  12. }
  13. super.run();
  14. }
  15. }
复制代码

之后新建测试类,代码如下:

  2. package com.thread.test;
  3. /*
  4. * 0-50执行的是主线程,50-100执行的是A线程,并且将A线程完全执行完后才继续执行主线程
  5. */
  6. public class ThreadDemo{
  7. public static void main(String[] args) {
  8. MyThread t = new MyThread("A");
  9. t.start();
  10. for (int i = 0; i < 100; i++) {
  11. if (i>50) {
  12. try {
  13. t.join();
  14. } catch (InterruptedException e) {
  15. e.printStackTrace();
  16. }
  17. }
  18. System.out.println("主线程"+"["+i+"]");
  19. }
  20. }
  21. }
复制代码

下面是Java Platform SE8 API中对Thread中Join方法的解释:

  2. public final void join(long millis)
  3. throws InterruptedExceptionWaits at most millis milliseconds for this thread to die. A timeout of 0 means to wait forever.
  4. This implementation uses a loop of this.wait calls conditioned on this.isAlive. As a thread terminates the this.notifyAll method is invoked. It is recommended that applications not use wait, notify, or notifyAll on Thread instances.
  5. Parameters:
  6. millis - the time to wait in milliseconds
  7. Throws:
  8. IllegalArgumentException - if the value of millis is negative
  9. InterruptedException - if any thread has interrupted the current thread. The interrupted status of the current thread is cleared when this exception is thrown.
复制代码

先上代码

新建一个Thread,代码如下:

  2. package com.thread.test;
  3. public class MyThread extends Thread {
  4. private String name;
  5. public MyThread(String name) {
  6. this.name = name;
  7. }
  8. @Override
  9. public void run() {
  10. for (int i = 0; i < 100; i++) {
  11. System.out.println(name+"["+i+"]");
  12. }
  13. super.run();
  14. }
  15. }
复制代码

之后新建测试类,代码如下:

  2. package com.thread.test;
  3. /*
  4. * 0-50执行的是主线程,50-100执行的是A线程,并且将A线程完全执行完后才继续执行主线程
  5. */
  6. public class ThreadDemo{
  7. public static void main(String[] args) {
  8. MyThread t = new MyThread("A");
  9. t.start();
  10. for (int i = 0; i < 100; i++) {
  11. if (i>50) {
  12. try {
  13. t.join();
  14. } catch (InterruptedException e) {
  15. e.printStackTrace();
  16. }
  17. }
  18. System.out.println("主线程"+"["+i+"]");
  19. }
  20. }
  21. }
复制代码

下面是Java Platform SE8 API中对Thread中Join方法的解释:

  2. public final void join(long millis)
  3. throws InterruptedExceptionWaits at most millis milliseconds for this thread to die. A timeout of 0 means to wait forever.
  4. This implementation uses a loop of this.wait calls conditioned on this.isAlive. As a thread terminates the this.notifyAll method is invoked. It is recommended that applications not use wait, notify, or notifyAll on Thread instances.
  5. Parameters:
  6. millis - the time to wait in milliseconds
  7. Throws:
  8. IllegalArgumentException - if the value of millis is negative
  9. InterruptedException - if any thread has interrupted the current thread. The interrupted status of the current thread is cleared when this exception is thrown.
复制代码

我自己的理解就是会强行进入使用join方法的线程，其他线程等待该线程完全执行完后才会进来。

收藏 邀请
上一篇：JAVA 根据数据库表内容生产树结构JSON数据的实例代码下一篇：Struts2实现文件上传功能实例解析

最新评论

相关分类

小黑屋|在路上 ( 蜀ICP备15035742号-1 )  

;

GMT+8, 2025-5-4 02:20

Copyright 2015-2025 djqfx

返回顶部