线程的优先级

package com.siwuxie095.thread;

class MyRun implements Runnable{

public void run() {

for (int i = 0; i < 5; i++) {

try {

//每打印一次，休眠1秒

Thread.sleep(1000);

//获取当前线程名称

System.out.println(Thread.currentThread().getName()+"-"+i);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

}

public class ThreadPriority {

public static void main(String[] args) {

//创建3个线程对象，传入匿名对象和字符串(标识线程)

Thread t1=new Thread(new MyRun(),"A");

Thread t2=new Thread(new MyRun(),"B");

Thread t3=new Thread(new MyRun(),"C");

//设置线程优先级 t1-最小， t2-正常，t3-最大

//优先级越大，或许会提高t3首次执行的速度，即能先抢到CPU资源

//但不是绝对能抢到

t1.setPriority(Thread.MIN_PRIORITY);

t2.setPriority(Thread.NORM_PRIORITY);

t3.setPriority(Thread.MAX_PRIORITY);

//启动这3个线程

t1.start();

t2.start();

t3.start();

}

}