先看三个方法原型:
 public void interrupt();
 public boolean isInterrupted();
 public static boolean interrupted();

 一、先说interrupt()方法,看注释
 Interrupts this thread.

Unless the current thread is interrupting itself, which is always permitted, the checkAccess method of this thread is invoked, which may cause a SecurityException to be thrown.

If this thread is blocked in an invocation of the wait(), wait(long), or wait(long, int) methods of the Object class, or of the join(), join(long), join(long, int), sleep(long), or sleep(long, int), methods of this class, then its interrupt status will be cleared and it will receive an InterruptedException.

If this thread is blocked in an I/O operation upon an interruptible channel then the channel will be closed, the thread's interrupt status will be set, and the thread will receive a java.nio.channels.ClosedByInterruptException.

If this thread is blocked in a java.nio.channels.Selector then the thread's interrupt status will be set and it will return immediately from the selection operation, possibly with a non-zero value, just as if the selector's wakeup method were invoked.

If none of the previous conditions hold then this thread's interrupt status will be set.

Interrupting a thread that is not alive need not have any effect.

Throws:
SecurityException - if the current thread cannot modify this thread

意思是说,当这个线程刚好或即将被阻塞在wait,join,sleep方法的时候,调用这个方法会引起这个线程的interrupt状态被清空(设为false),并且前者三个方法会抛出InterruptedException。
 除此之外(这个线程不处于wait,join,sleep方法),这个线程的interrupt状态会被设置(设为true)。

二、isInterrupted()方法,看源码:

  1. public boolean isInterrupted() {
  2. return isInterrupted(false);
  3. }
  4. private native boolean isInterrupted(boolean ClearInterrupted);

看注释:
  Tests whether this thread has been interrupted. The interrupted status of the thread is unaffected by this method.

意思是说:返回这个线程是否被interrupt了,调用这个方法不会影响这个线程的interrupt状态

三、public static boolean interrupted();看源码:

  1. public static boolean interrupted() {
  2. return currentThread().isInterrupted(true);
  3. }
  4. private native boolean isInterrupted(boolean ClearInterrupted);

看注释:
 Tests whether the current thread has been interrupted. The interrupted status of the thread is cleared by this method. 
 In other words, if this method were to be called twice in succession, the second call would return false (unless the current thread were interrupted again, after the first call had cleared its interrupted status and before the second call had examined it).

意思是说:调用这个方法会返回当前线程的interrupt状态(true或false),并把当前线程的interrupt状态清空(设为false)。
 注意:这个是个静态方法,并且返回的是当前线程状态,并不一定是调用者的线程状态

看例子:
 例一:

  1. @Test
  2. public void test1(){
  3. Thread t1= new Thread(){
  4. @Override
  5. public void run() {
  6. System.out.println("begin");
  7. for(int i=0;i<100;i++){
  8. System.out.println("i="+i+" "+this.isInterrupted());
  9. try {
  10. Socket socket= new Socket("10.22.1.115",23);//不存在的ip,让这句话执行时间长一些,方便看效果
  11. } catch (UnknownHostException e1) {
  12. // TODO Auto-generated catch block
  13. e1.printStackTrace();
  14. } catch (IOException e1) {
  15. // TODO Auto-generated catch block
  16. e1.printStackTrace();
  17. }
  18. System.out.println("i="+i+"  this.isInterrupted():"+this.isInterrupted());
  19. System.out.println("i="+i+"  Thread.interrupted():"+Thread.interrupted());
  20. System.out.println("i="+i+"  this.isInterrupted():"+this.isInterrupted());
  21. try {
  22. Thread.sleep(5000);
  23. } catch (InterruptedException e) {
  24. // TODO Auto-generated catch block
  25. //  e.printStackTrace();
  26. System.out.println("exception:"+this.isInterrupted());
  27. System.out.println("exception:"+Thread.interrupted());
  28. //  return;
  29. }
  30. }
  31. System.out.println("end");
  32. }
  33. };
  34. t1.start();
  35. try {
  36. Thread.sleep(3000);
  37. } catch (InterruptedException e) {
  38. // TODO Auto-generated catch block
  39. e.printStackTrace();
  40. }
  41. System.out.println(t1.interrupted()+"  "+Thread.interrupted());
  42. System.out.println("begin interrupt  t1.isInterrupted():"+t1.isInterrupted());
  43. t1.interrupt();
  44. System.out.println(t1.interrupted()+"  "+Thread.interrupted());
  45. System.out.println("end interrupt  t1.isInterrupted():"+t1.isInterrupted());
  46. System.out.println(t1.interrupted()+"  "+Thread.interrupted());
  47. try {
  48. Thread.sleep(100000);
  49. } catch (InterruptedException e) {
  50. // TODO Auto-generated catch block
  51. e.printStackTrace();
  52. }
  53. }

执行结果:

begin
i=0 false
false  false
begin interrupt  t1.isInterrupted():false
false  false
end interrupt  t1.isInterrupted():true
false  false
java.net.ConnectException: Connection timed out: connect
 at java.net.PlainSocketImpl.socketConnect(Native Method)
 at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
 at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
 at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
 at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
 at java.net.Socket.connect(Socket.java:529)
 at java.net.Socket.connect(Socket.java:478)
 at java.net.Socket.<init>(Socket.java:375)
 at java.net.Socket.<init>(Socket.java:189)
 at baby.thread.InterruptTest$1.run(InterruptTest.java:21)
i=0  this.isInterrupted():true
i=0  Thread.interrupted():true
i=0  this.isInterrupted():false
休息5秒钟
i=1 false
…………

例二:注释掉Thread.interrupted()一行

  1. @Test
  2. public void test13(){
  3. Thread t1= new Thread(){
  4. @Override
  5. public void run() {
  6. System.out.println("begin");
  7. for(int i=0;i<100;i++){
  8. System.out.println("i="+i+" "+this.isInterrupted());
  9. try {
  10. Socket socket= new Socket("10.22.1.115",23);
  11. } catch (UnknownHostException e1) {
  12. // TODO Auto-generated catch block
  13. e1.printStackTrace();
  14. } catch (IOException e1) {
  15. // TODO Auto-generated catch block
  16. e1.printStackTrace();
  17. }
  18. System.out.println("i="+i+"  this.isInterrupted():"+this.isInterrupted());
  19. //  System.out.println("i="+i+"  Thread.interrupted():"+Thread.interrupted());
  20. System.out.println("i="+i+"  this.isInterrupted():"+this.isInterrupted());
  21. try {
  22. Thread.sleep(5000);
  23. } catch (InterruptedException e) {
  24. // TODO Auto-generated catch block
  25. //  e.printStackTrace();
  26. System.out.println("exception:"+this.isInterrupted());
  27. System.out.println("exception:"+Thread.interrupted());
  28. //  return;
  29. }
  30. }
  31. System.out.println("end");
  32. }
  33. };
  34. t1.start();
  35. try {
  36. Thread.sleep(3000);
  37. } catch (InterruptedException e) {
  38. // TODO Auto-generated catch block
  39. e.printStackTrace();
  40. }
  41. System.out.println(t1.interrupted()+"  "+Thread.interrupted());
  42. System.out.println("begin interrupt  t1.isInterrupted():"+t1.isInterrupted());
  43. t1.interrupt();
  44. System.out.println(t1.interrupted()+"  "+Thread.interrupted());
  45. System.out.println("end interrupt  t1.isInterrupted():"+t1.isInterrupted());
  46. System.out.println(t1.interrupted()+"  "+Thread.interrupted());
  47. try {
  48. Thread.sleep(100000);
  49. } catch (InterruptedException e) {
  50. // TODO Auto-generated catch block
  51. e.printStackTrace();
  52. }
  53. }

输出:
 begin
i=0 false
false  false
begin interrupt  t1.isInterrupted():false
false  false
end interrupt  t1.isInterrupted():true
false  false
java.net.ConnectException: Connection timed out: connect
 at java.net.PlainSocketImpl.socketConnect(Native Method)
 at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
 at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
 at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
 at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
 at java.net.Socket.connect(Socket.java:529)
 at java.net.Socket.connect(Socket.java:478)
 at java.net.Socket.<init>(Socket.java:375)
 at java.net.Socket.<init>(Socket.java:189)
 at baby.thread.InterruptTest$2.run(InterruptTest.java:82)
i=0  this.isInterrupted():true
i=0  this.isInterrupted():true
没有休息5秒,直接下面输出
exception:false
exception:false
i=1 false

例三:自己中断自己

  1. @Test
  2. public void test12(){
  3. Thread t1= new Thread(){
  4. @Override
  5. public void run() {
  6. System.out.println("begin");
  7. for(int i=0;i<100;i++){
  8. System.out.println("i="+i+" "+this.isInterrupted());
  9. interrupt();
  10. try {
  11. Socket socket= new Socket("10.22.1.115",23);
  12. } catch (UnknownHostException e1) {
  13. // TODO Auto-generated catch block
  14. e1.printStackTrace();
  15. } catch (IOException e1) {
  16. // TODO Auto-generated catch block
  17. e1.printStackTrace();
  18. }
  19. System.out.println("i="+i+"  this.isInterrupted():"+this.isInterrupted());
  20. System.out.println("i="+i+"  Thread.interrupted():"+Thread.interrupted());
  21. System.out.println("i="+i+"  this.isInterrupted():"+this.isInterrupted());
  22. try {
  23. Thread.sleep(5000);
  24. } catch (InterruptedException e) {
  25. // TODO Auto-generated catch block
  26. //  e.printStackTrace();
  27. System.out.println("exception:"+this.isInterrupted());
  28. System.out.println("exception:"+Thread.interrupted());
  29. //  return;
  30. }
  31. }
  32. System.out.println("end");
  33. }
  34. };
  35. t1.start();
  36. try {
  37. Thread.sleep(3000);
  38. } catch (InterruptedException e) {
  39. // TODO Auto-generated catch block
  40. e.printStackTrace();
  41. }
  42. System.out.println(t1.interrupted()+"  "+Thread.interrupted());
  43. System.out.println("begin interrupt  t1.isInterrupted():"+t1.isInterrupted());
  44. //  t1.interrupt();
  45. System.out.println(t1.interrupted()+"  "+Thread.interrupted());
  46. System.out.println("end interrupt  t1.isInterrupted():"+t1.isInterrupted());
  47. System.out.println(t1.interrupted()+"  "+Thread.interrupted());
  48. try {
  49. Thread.sleep(100000);
  50. } catch (InterruptedException e) {
  51. // TODO Auto-generated catch block
  52. e.printStackTrace();
  53. }
  54. }

结果输出和例一一样:
 begin
i=0 false
false  false
begin interrupt  t1.isInterrupted():true
false  false
end interrupt  t1.isInterrupted():true
false  false
java.net.ConnectException: Connection timed out: connect
 at java.net.PlainSocketImpl.socketConnect(Native Method)
 at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
 at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
 at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
 at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
 at java.net.Socket.connect(Socket.java:529)
 at java.net.Socket.connect(Socket.java:478)
 at java.net.Socket.<init>(Socket.java:375)
 at java.net.Socket.<init>(Socket.java:189)
 at baby.thread.InterruptTest$3.run(InterruptTest.java:143)
i=0  this.isInterrupted():true
i=0  Thread.interrupted():true
i=0  this.isInterrupted():false
休息5秒
i=1 false

例四:中断时处于sleep方法

  1. @Test
  2. public void test14(){
  3. Thread t1= new Thread(){
  4. @Override
  5. public void run() {
  6. System.out.println("begin");
  7. for(int i=0;i<100;i++){
  8. System.out.println("i="+i+" "+this.isInterrupted());
  9. System.out.println("i="+i+"  this.isInterrupted():"+this.isInterrupted());
  10. //                  System.out.println("i="+i+"  Thread.interrupted():"+Thread.interrupted());
  11. System.out.println("i="+i+"  this.isInterrupted():"+this.isInterrupted());
  12. try {
  13. Thread.sleep(5000);
  14. } catch (InterruptedException e) {
  15. // TODO Auto-generated catch block
  16. //  e.printStackTrace();
  17. System.out.println("exception:"+this.isInterrupted());
  18. System.out.println("exception:"+Thread.interrupted());
  19. //  return;
  20. }
  21. }
  22. System.out.println("end");
  23. }
  24. };
  25. t1.start();
  26. try {
  27. Thread.sleep(3000);
  28. } catch (InterruptedException e) {
  29. // TODO Auto-generated catch block
  30. e.printStackTrace();
  31. }
  32. //  System.out.println(t1.interrupted()+"  "+Thread.interrupted());
  33. System.out.println("begin interrupt  t1.isInterrupted():"+t1.isInterrupted());
  34. t1.interrupt();
  35. //System.out.println(t1.interrupted()+"  "+Thread.interrupted());
  36. System.out.println("end interrupt  t1.isInterrupted():"+t1.isInterrupted());
  37. //  System.out.println(t1.interrupted()+"  "+Thread.interrupted());
  38. try {
  39. Thread.sleep(100000);
  40. } catch (InterruptedException e) {
  41. // TODO Auto-generated catch block
  42. e.printStackTrace();
  43. }
  44. }

结果输出:
 begin
i=0 false
i=0  this.isInterrupted():false
i=0  this.isInterrupted():false
begin interrupt  t1.isInterrupted():false
没有休息5秒
exception:false
exception:false
i=1 false
i=1  this.isInterrupted():false
i=1  this.isInterrupted():false
end interrupt  t1.isInterrupted():false

http://blog.csdn.net/chaofanwei/article/details/19157747

http://www.cnblogs.com/hanyuan/archive/2013/03/10/2952229.html

http://stackoverflow.com/questions/13623445/future-cancel-method-is-not-working

关于Thread类中三个interrupt方法的研究与学习(转)的更多相关文章

  1. 【Java_多线程并发编程】基础篇—Thread类中start()和run()方法的区别

    1. start() 和 run()的区别说明 start()方法: 它会启动一个新线程,并将其添加到线程池中,待其获得CPU资源时会执行run()方法,start()不能被重复调用. run()方法 ...

  2. 正确停止线程的方式三 使用Thread类中的内置的中断标记位-----------不熟悉

    package charpter10; public class Processor implements Runnable { @Override public void run() { for ( ...

  3. Java线程状态及Thread类中的主要方法

    要想实现多线程,就必须在主线程中创建新的线程对象. 不论什么线程一般具有5种状态,即创建,就绪,执行,堵塞,终止. 创建状态: 在程序中用构造方法创建了一个线程对象后,新的线程对象便处于新建状态,此时 ...

  4. Thread类中的join方法

    package charpter06; //类实现接口public class Processor implements Runnable { // 重写接口方法 @Override public v ...

  5. 多线程(Thread类中的方法线程名称)

    1 package multithread; 2 3 /* 4 * 如何创建一个线程呢? 5 * 6 * 创建线程方式一:继承Thread类. 7 * 8 * 步骤: 9 * 1,定义一个类继承Thr ...

  6. java 多线程3:Thread类中的静态方法

    Thread类中的静态方法 Thread类中的静态方法表示操作的线程是"正在执行静态方法所在的代码块的线程".为什么Thread类中要有静态方法,这样就能对CPU当前正在运行的线程 ...

  7. UnSafe类中的一些重要方法

    UnSafe类中的一些重要方法 JDK中的rt.jar保重Unsafe类中提供了硬件级别的原子性操作,Unsafe类中的方法都是navtice方法,他们使用JNI的方式访问C++实现库,下面我们来了解 ...

  8. Python之路(第四十二篇)线程相关的其他方法、join()、Thread类的start()和run()方法的区别、守护线程

    一.线程相关的其他方法 Thread实例对象的方法 # isAlive(): 返回线程是否活动的. # getName(): 返回线程名. # setName(): 设置线程名. ​ threadin ...

  9. python: 面向对象:类和对象调用类中的变量和方法

    一. 面向对象初识 我们在生活中做事都是面向过程的,前面实现一些基本逻辑功能代码也是用面向过程的语句实现的,后来学了函数,把这些功能又装到了函数里.但用面向过程的方法去写程序,只能实现一个功能,我们要 ...

随机推荐

  1. LVS集群的体系结构

    2.LVS主要组成部分为: 负载调度器(load balancer/ Director),它是整个集群对外面的前端机,负责将客户的请求发送到一组服务器上执行,而客户认为服务是来自一个IP地址(我们可称 ...

  2. OC补充

    OC 1成员变量默认初始化为0 2匿名对象:就是没有名字的对象,比如:(不建议使用) 3 [Car new]->speed = 300; [[Car new] run];(运行结果speed为0 ...

  3. Homebrew 1.0.0 发布,MacOS 上的包管理器

    神器,没有它不知道怎么用macos https://www.oschina.net/news/77367/homebrew-1-0-0

  4. Java正则表达式基本应用

    一.概述 正则表达式因为其强大的字符串处理能力,刚开始被被广泛地应用到各种UNIX工具中,如大家熟知的 Perl脚本语言 .后来正则表达式在各种 计算机语言 和各种应用领域得到了广泛的应用和发展,目前 ...

  5. codeforces 487E Tourists

    如果不是uoj上有的话(听说这是China Round),我有可能就错过这道题目了(这是我有史以来为oi写的最长的代码,用了我一天TAT!). 题目 传送门. 一个连通无向图,点上有权,支持两种操作: ...

  6. Swift - iOS中各种视图控制器(View Controller)的介绍

    在iOS中,不同的视图控制器负责不同的功能,采用不同的风格向用户呈现信息.下面对各个视图控制器做个总结: 1,标准视图控制器 - View Controller 这个控制器只是用来呈现内容.通常会用来 ...

  7. 如何在VC中显示透明背景位图

    简单的调用系统API. Windows NT/2000/XP: Included in Windows 2000 and later.Windows 95/98/Me: Included in Win ...

  8. Java EE登陆界面生成随机数防止恶意注册或者登录

    package cn.com; import java.awt.Color; import java.awt.Font; import java.awt.Graphics; import java.a ...

  9. 621 - Secret Research

     Secret Research  At a certain laboratory results of secret research are thoroughly encrypted. A res ...

  10. windows live writer插件说明文档(附录网盘地址)

    百度云地址:http://pan.baidu.com/s/1hqnjzjY 1.Screen Capture tool 用于直接在WLWriter中进行截图的一个插件,要配合SnagIt 这个软件使用 ...