Java中断线程的方法

public class SleepInterrupt extends Object implements Runnable{ 
 public void run(){ 
  try{ 
   System.out.println("in run() - about to sleep for 20 seconds"); 
   Thread.sleep(20000); 
   System.out.println("in run() - woke up"); 
  }catch(InterruptedException e){ 
   System.out.println("in run() - interrupted while sleeping"); 
   //处理完中断异常后，返回到run（）方法人口， 
   //如果没有return，线程不会实际被中断，它会继续打印下面的信息 
   return; 
  } 
  System.out.println("in run() - leaving normally"); 
 } 
 public static void main(String[] args) { 
  SleepInterrupt si = new SleepInterrupt(); 
  Thread t = new Thread(si); 
  t.start(); 
  //主线程休眠2秒，从而确保刚才启动的线程有机会执行一段时间 
  try { 
   Thread.sleep(2000); 
  }catch(InterruptedException e){ 
   e.printStackTrace(); 
  } 
  System.out.println("in main() - interrupting other thread"); 
  //中断线程t 
  t.interrupt(); 
  System.out.println("in main() - leaving"); 
 } 
} 

public class PendingInterrupt extends Object { 
 public static void main(String[] args){ 
  //如果输入了参数，则在mian线程中中断当前线程（亦即main线程） 
  if( args.length > 0 ){ 
   Thread.currentThread().interrupt(); 
  } 
  //获取当前时间 
  long startTime = System.currentTimeMillis(); 
  try{ 
   Thread.sleep(2000); 
   System.out.println("was NOT interrupted"); 
  }catch(InterruptedException x){ 
   System.out.println("was interrupted"); 
  } 
  //计算中间代码执行的时间 
  System.out.println("elapsedTime=" + ( System.currentTimeMillis() - startTime)); 
 } 
} 

public class InterruptCheck extends Object{ 
 public static void main(String[] args){ 
  Thread t = Thread.currentThread(); 
  System.out.println("Point A: t.isInterrupted()=" + t.isInterrupted()); 
  //待决中断，中断自身 
  t.interrupt(); 
  System.out.println("Point B: t.isInterrupted()=" + t.isInterrupted()); 
  System.out.println("Point C: t.isInterrupted()=" + t.isInterrupted()); 
  try{ 
   Thread.sleep(2000); 
   System.out.println("was NOT interrupted"); 
  }catch( InterruptedException x){ 
   System.out.println("was interrupted"); 
  } 
  //抛出异常后，会清除中断标志，这里会返回false 
  System.out.println("Point D: t.isInterrupted()=" + t.isInterrupted()); 
 } 
} 

public class InterruptReset extends Object { 
 public static void main(String[] args) { 
  System.out.println( 
   "Point X: Thread.interrupted()=" + Thread.interrupted()); 
  Thread.currentThread().interrupt(); 
  System.out.println( 
   "Point Y: Thread.interrupted()=" + Thread.interrupted()); 
  System.out.println( 
   "Point Z: Thread.interrupted()=" + Thread.interrupted()); 
 } 
}