Thead.yield()静态方法

static void yield()-----想让哪个线程后执行，就写到哪个线程里。只能提高处理器分配时间片段几率。

   线程对象让步的功能：让出时间片段，此线程进入就绪状态。

package test.core.threads;
 
public class YieldExample
{
   public static void main(String[] args)
   {
      Thread producer = new Producer();
      Thread consumer = new Consumer();
       
      producer.setPriority(Thread.MIN_PRIORITY); //Min Priority
      consumer.setPriority(Thread.MAX_PRIORITY); //Max Priority
       
      producer.start();
      consumer.start();
   }
}
 
class Producer extends Thread
{
   public void run()
   {
      for (int i = 0; i < 5; i++)
      {
         System.out.println("I am Producer : Produced Item " + i);
         Thread.yield();
      }
   }
}
 
class Consumer extends Thread
{
   public void run()
   {
      for (int i = 0; i < 5; i++)
      {
         System.out.println("I am Consumer : Consumed Item " + i);
         Thread.yield();
      }
   }
}

如代码：将producer优先级设为最小，将consumer优先级设为最大。

分laing两种情况：

1、不使用Thread.yield()方法输出结果为（通常是优先级高的先打印，还是要看处理器分配时间片。）

I am Consumer : Consumed Item 0
 I am Consumer : Consumed Item 1
 I am Consumer : Consumed Item 2
 I am Consumer : Consumed Item 3
 I am Consumer : Consumed Item 4
 I am Producer : Produced Item 0
 I am Producer : Produced Item 1
 I am Producer : Produced Item 2
 I am Producer : Produced Item 3
 I am Producer : Produced Item 4

2、使用Thread.yield()方法输出结果为

I am Producer : Produced Item 0
 I am Consumer : Consumed Item 0
 I am Producer : Produced Item 1
 I am Consumer : Consumed Item 1
 I am Producer : Produced Item 2
 I am Consumer : Consumed Item 2
 I am Producer : Produced Item 3
 I am Consumer : Consumed Item 3
 I am Producer : Produced Item 4
 I am Consumer : Consumed Item 4