Java多线程-线程的调度(优先级)

与线程休眠类似，线程的优先级仍然无法保障线程的执行次序。只不过，优先级高的线程获取CPU资源的概率较大，优先级低的并非没机会执行。

线程的优先级用1-10之间的整数表示，数值越大优先级越高，默认的优先级为5。

在一个线程中开启另外一个新线程，则新开线程称为该线程的子线程，子线程初始优先级与父线程相同。

package cn.thread;

/**
 * 线程的调度(优先级)
 *
 * @author 林计钦
 * @version 1.0 2013-7-24 上午09:30:42
 */
public class ThreadPriority {

    public static void main(String[] args) {
           ThreadPriority thread=new ThreadPriority();
           Thread t1 = thread.new MyThread1();
           Thread t2 = new Thread(thread.new MyRunnable());
           t1.setPriority(10);
           t2.setPriority(1); 

           t2.start();
           t1.start();
    }

    class MyThread1 extends Thread {
        public void run() {
            for (int i = 0; i < 10; i++) {
                System.out.println("线程1第" + i + "次执行！");
                try {
                    Thread.sleep(100);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    class MyRunnable implements Runnable {
        public void run() {
            for (int i = 0; i < 10; i++) {
                System.out.println("线程2第" + i + "次执行！");
                try {
                    Thread.sleep(100);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}