线程的priority能告诉调度程序其重要性如何，今天我们通过实例来学习一下java多线程中的关于优先级的知识。我从没被谁知道，所以也没被谁忘记。在别人的回忆中生活，并不是我的目的。

 

java多线程的优先级

一、java多线程中关于优先级的实例

package com.linux.huhx.thread1;import java.util.Random;import java.util.concurrent.TimeUnit;public class PriorityThread extends Thread {    PriorityThread(String name, int priority) {        super(name);        setPriority(priority);    }    @Override    public void run() {        for (int i = 0; i < 10; i++) {            try {                System.out.println(Thread.currentThread().getName() + ", " + i + ", priority = " + Thread.currentThread().getPriority());                TimeUnit.SECONDS.sleep(new Random().nextInt(5));            } catch (InterruptedException e) {                e.printStackTrace();            }        }    }}

测试的主体类内容如下：

package com.linux.huhx.thread1;public class PriorityThreadTest {    public static void main(String[] args) {        PriorityThread thread1 = new PriorityThread("T-1", Thread.NORM_PRIORITY);        PriorityThread thread2 = new PriorityThread("T-2", Thread.MAX_PRIORITY);        thread1.start();        thread2.start();    }}

一次的运行结果如下：

T-2, 0, priority = 10T-1, 0, priority = 5T-2, 1, priority = 10T-2, 2, priority = 10T-1, 1, priority = 5T-1, 2, priority = 5T-1, 3, priority = 5T-2, 3, priority = 10T-1, 4, priority = 5T-1, 5, priority = 5T-2, 4, priority = 10T-2, 5, priority = 10T-2, 6, priority = 10T-1, 6, priority = 5T-2, 7, priority = 10T-1, 7, priority = 5T-1, 8, priority = 5T-1, 9, priority = 5T-2, 8, priority = 10T-2, 9, priority = 10

 尽管处理器处理现有线程集的顺序是不确定的，但是如果有许多线程被阻塞并在等待运行，那么调度程序将倾向于让优先权最高的线程先执行。

 

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