标签：ack 友情链接 告诉 lan out pack 博客 bsp 优先权
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。
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 = 10 T-1, 0, priority = 5 T-2, 1, priority = 10 T-2, 2, priority = 10 T-1, 1, priority = 5 T-1, 2, priority = 5 T-1, 3, priority = 5 T-2, 3, priority = 10 T-1, 4, priority = 5 T-1, 5, priority = 5 T-2, 4, priority = 10 T-2, 5, priority = 10 T-2, 6, priority = 10 T-1, 6, priority = 5 T-2, 7, priority = 10 T-1, 7, priority = 5 T-1, 8, priority = 5 T-1, 9, priority = 5 T-2, 8, priority = 10 T-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。
标签：ack 友情链接 告诉 lan out pack 博客 bsp 优先权
原文地址：http://www.cnblogs.com/huhx/p/baseusejavathread4.html
