JAVA多线程优先级运行顺序的问题

先上代码
class myRunnable1 implements Runnable
{
public void run()
{
for(int i=0;i<50000;i++)
{
System.out.print("1");
}
}
}

class myRunnable2 implements Runnable
{
public void run()
{
for(int i=0;i<50000;i++)
{
System.out.print("2");
}
}
}

class myRunnable3 implements Runnable
{
public void run()
{
for(int i=0;i<50000;i++)
{
System.out.print("3");
}
}
}

class myRunnable4 implements Runnable
{
public void run()
{
for(int i=0;i<50000;i++)
{
System.out.print("4");
}
}
}

class myRunnable5 implements Runnable
{
public void run()
{
for(int i=0;i<50000;i++)
{
System.out.print("5");
}
}
}

class myRunnable6 implements Runnable
{
public void run()
{
for(int i=0;i<50000;i++)
{
System.out.print("6");
}
}
}

public class myRun
{
public static void main(String[] args)
{
myRunnable1 mr1=new myRunnable1();
myRunnable2 mr2=new myRunnable2();
myRunnable3 mr3=new myRunnable3();
myRunnable4 mr4=new myRunnable4();
myRunnable5 mr5=new myRunnable5();
myRunnable6 mr6=new myRunnable6();
Thread t1=new Thread(mr1);
Thread t2=new Thread(mr2);
Thread t3=new Thread(mr3);
Thread t4=new Thread(mr4);
Thread t5=new Thread(mr5);
Thread t6=new Thread(mr6);
t1.setPriority(Thread.MAX_PRIORITY);
t2.setPriority(Thread.MAX_PRIORITY);
t3.setPriority(Thread.MAX_PRIORITY);
t4.setPriority(Thread.MAX_PRIORITY);
t5.setPriority(Thread.MAX_PRIORITY);
t6.setPriority(Thread.MIN_PRIORITY);
t1.start();
t2.start();
t3.start();
t4.start();
t5.start();
t6.start();
}
}

设置了优先级，6个线程运行的顺序是随机的。最开始我只写了2个线程，设置优先级，运行随机，我以为是4核CPU可以同时运行，所以不分优先级。后来我写了6个线程，也把运行次数提升到了50000次，前5个线程最高优先级，第六个最低优先级，但运行顺序还是随机的。求各位高手解释啊。。。

举报该文章