java多线程优先级问题

package com.ming.thread.threadpriority;

public class MyThread extends Thread {

    public MyThread(String name) {
        super(name);
    }

    public void run() {
        for (int i = 0; i < 5; i++) {
            System.out.println(Thread.currentThread().getName() + "(" + Thread.currentThread().getPriority() + ")"+ ", loop " + i);
        }
    }
}

package com.ming.thread.threadpriority;

/**
 * 线程的优先级的值是1--10
 * @author ming
 *
 */

public class Run {

    public static void main(String[] args) {
        MyThread t1=new MyThread("t1");
        MyThread t2=new MyThread("t2");
        MyThread t3=new MyThread("t3");
        t1.setPriority(6);
        t2.setPriority(Thread.MAX_PRIORITY);
        t3.setPriority(1);
        t1.start();
        t2.start();
        t3.start();
    }
}