java基础---->多线程之priority（四）

　　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 = 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。

友情链接

• 关于java中多线程优先级的博客：http://www.cnblogs.com/wuyudong/p/java-multithreading8.html