线程优先级分为10个等级，主线程优先级不变，优先级越高代表执行的顺序越靠前，但不排除出现优先级低的线程先运行。
线程若想设置优先级，必须先设置再启动！！！
package com.example.demo.thread;
/**
* @projectName: demo
* @package: com.example.demo.thread
* @className: TestPriority
* @author:
* @description: 测试线程的优先级
* @date: 2021/12/7 22:06
*/
public class TestPriority {
public static void main(String[] args) {
System.out.println(Thread.currentThread().getName()+":------------------>"+Thread.currentThread().getPriority());
MyPriority myPriority = new MyPriority();
Thread t1 = new Thread(myPriority,"t1");
Thread t2 = new Thread(myPriority,"t2");
Thread t3 = new Thread(myPriority,"t3");
Thread t4 = new Thread(myPriority,"t4");
Thread t5 = new Thread(myPriority,"t5");
t1.setPriority(Thread.MIN_PRIORITY);
t2.setPriority(Thread.MAX_PRIORITY);
t3.setPriority(Thread.NORM_PRIORITY);
t4.setPriority(7);
t5.setPriority(3);
t1.start();
t2.start();
t3.start();
t4.start();
t5.start();
}
}
class MyPriority implements Runnable{
@Override
public void run() {
System.out.println(Thread.currentThread().getName()+":------------------>"+Thread.currentThread().getPriority());
}
}
第一次执行
第二次执行
第N次执行
