JAVA-线程优先级setPriority
1. 说明
线程分为1-10级，10级最高，优先级的高低不代表线程优先执行，需要看CPU的情况，一般情况下优先级高的先执行，程序先执行主方法，在执行线程。

2. 代码实现

public class TestPriorty {public static void main(String[] args) {//主线程System.out.println(Thread.currentThread().getName()+"线程正在进行中"+Thread.currentThread().getPriority());Mypriorty mypriorty=new Mypriorty();//子线程Thread thread1=new Thread(mypriorty,"小黄");Thread thread2=new Thread(mypriorty,"小红");Thread thread3=new Thread(mypriorty,"小李");Thread thread4=new Thread(mypriorty,"小明");Thread thread5=new Thread(mypriorty,"小张");//设置优先级/启动线程thread1.setPriority(1);thread1.start();thread2.setPriority(5);thread2.start();thread3.setPriority(10);thread3.start();thread4.setPriority(4);thread4.start();thread5.setPriority(Thread.MAX_PRIORITY);//最高级thread5.start();}}
class Mypriorty implements  Runnable{@Overridepublic void run() {//打印线程名称和优先级try {            System.out.println(Thread.currentThread().getName()+"线程正在进行中"+Thread.currentThread().getPriority());} catch (Exception e) {e.printStackTrace();}catch (Error d) {d.printStackTrace();}}
}

3. 运行结果