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??????????????????????????????????????????趨??
???????????ó???????MIN_PRIORITY??MAX_PRIORITY??NORM_PRIORITY???趨?????
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??????Thread.java??yield()???????￡?
????/**
????* A hint to the scheduler that the current thread is willing to yield its current use of a processor. The scheduler is free to ignore
????* this hint. Yield is a heuristic attempt to improve relative progression between threads that would otherwise over-utilize a CPU.
????* Its use should be combined with detailed profiling and benchmarking to ensure that it actually has the desired effect.
????*/
????public static native void yield();
???????????о???1??????????????????
????Yield?????????????(native)????
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???????????????????У?????????????????????????????????????????????趨?С??????????????趨????????????Thread.yield()???????????????????????иó?????е???yield()????????????????????????????????????????????????????????
????????yield()?????????????????δ?????????л?????????????????????????
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();
}
}
}