线程优先级

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# 线程优先级

1. 线程优先级

   Java提供一个线程调度器来监控程序中启动后进入就绪状态的所有线程，线程调度器按照优先级决定应该调用哪个线程来执行

2. 线程的优先级用数字表示，范围1~10

   Thread.MIN_PRIORITY = 1;

   Thread.MAX_PRIMORITY = 10;

   Thread.NORM_PRIMORITY = 5;

3. 使用getPriority().setPriority(int xxx)来获取线程优先级

4. 优先级的设定建议在start()调度前

5. 优先级低是意味着获得调度的概率低，并不是优先级低就不会被调用了，这都是看cpu的调度。

   package Thread;
   ?
   public class PriorityThread extends Thread {
       public static void main(String[] args) {
           System.out.println(Thread.currentThread().getName() + "---->" + Thread.currentThread().getPriority());
           MyPrioryity myPrioryity = new MyPrioryity();
           Thread t1 = new Thread(myPrioryity,"线程1");
           Thread t2 = new Thread(myPrioryity,"线程2");
           Thread t3 = new Thread(myPrioryity,"线程3");
           Thread t4 = new Thread(myPrioryity,"线程4");
           Thread t5 = new Thread(myPrioryity,"线程5");
           Thread t6 = new Thread(myPrioryity,"线程6");
           t1.start();
           t2.setPriority(1);
           t2.start();
           t3.setPriority(4);
           t3.start();
           t4.setPriority(Thread.MAX_PRIORITY);//Max_PRIORITY = 10
           t4.start();
           t5.setPriority(7);
           t5.start();
           t6.setPriority(8);
           t6.start();
       }
   }
   ?
   class MyPrioryity implements Runnable {
   ?
       @Override
       public void run() {
           System.out.println(Thread.currentThread().getName() + "---->" + Thread.currentThread().getPriority());
       }
   }

    

线程优先级

标签：orm   pac   xtend   like   min   contain   cpu   状态   thread   

原文地址：https://www.cnblogs.com/QIDream/p/14171253.html