Question

我有以下代码：

import java.security.SecureRandom;

public class Producer implements Runnable
{
   private static final SecureRandom generator = new SecureRandom();
   private final Buffer sharedLocation; // reference to shared object

   // constructor
   public Producer(Buffer sharedLocation)
   {
      this.sharedLocation = sharedLocation;
   } 

   // store values from 1 to 10 in sharedLocation
   public void run()                             
   {
      int sum = 0;

      for (int count = 1; count <= 10; count++)
      {
         try // sleep 0 to 3 seconds, then place value in Buffer
         {
            Thread.sleep(generator.nextInt(3000)); // random sleep
            sharedLocation.blockingPut(count); // set value in buffer
            sum += count; // increment sum of values
            System.out.printf("\t%2d%n", sum);
         } 
         catch (InterruptedException exception) 
         {
            Thread.currentThread().interrupt(); 
         } 
      } 

      System.out.printf(
         "Producer done producing%nTerminating Producer%n");
   } 
} // end class Producer

我不明白它的“try-catch”部分：是不是方法sleep（）将抛出InterruptedException（），因此try块将终止并且catch块将执行？然后我们如何在try块中的sleep（）语句之后编写语句，即。他们不能正确执行？

Answer 1

当Thread.sleep正常完成时，将执行任何后续语句。只有当线程在sleep之前或期间被中断时，这些语句才会被执行。

请注意，try / catch应该在循环周围：因为Thread.currentThread().interrupt()，因为Thread.currentThread().interrupt()，下一次循环迭代的睡眠将立即中断，然后你调用try { for (int count = 1; count <= 10; count++) { Thread.sleep(generator.nextInt(3000)); // random sleep // ... } } catch (InterruptedException exception) { Thread.currentThread().interupt(); }，在下一个循环迭代中睡眠将立即中断，等等。

一旦中断，你也可以放弃循环：

cld2

方法睡眠如何在java中工作

1 个答案: