Java_162_Thread_Priority优先级

最新推荐文章于 2023-02-12 22:42:00 发布

Mr_Pmc

最新推荐文章于 2023-02-12 22:42:00 发布

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分类专栏： Java_笔记

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本文介绍了Java中线程的优先级，包括最小优先级、默认优先级和如何设置及获取优先级。线程的优先级只影响执行的概率，并不确保执行顺序。

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Thread.MIM_PRIORITY/1-10 默认 5

Thread.setPriority(1-10);设置优先级

Thread.currentThread().getPriority();获取优先级

优先级是概率执行，并不是绝对先后顺序

package TCPUDPThread;

/**
 * 优先级
 * priority
 * 1-10之间
 * 1.NORM_PRIORITY 5 默认
 * 2.MIN_PRIORITY 1 
 * 3.MAX_PRIORITY 10
 * 概率执行,不代表绝对的先后顺序
 */
public class PriorityTest {
	public static void main(String[] args) {
		System.out.println(Thread.currentThread().getPriority());
		MyPriority t1=new MyPriority();
		Thread t2=new Thread(t1,"01");
		Thread t3=new Thread(t1,"02");
		Thread t4=new Thread(t1,"03");
		Thread t5=new Thread(t1,"04");
		Thread t6=new Thread(t1,"05");
		Thread t7=new Thread(t1,"06");
		
		/**
		 * 设置优先级在启动前
		 */
		t2.setPriority(Thread.MAX_PRIORITY);
		t3.setPriority(Thread.MAX_PRIORITY);
		t4.setPriority(Thread.MAX_PRIORITY);
		t5.setPriority(Thread.MIN_PRIORITY);
		t6.setPriority(Thread.MIN_PRIORITY);
		t7.setPriority(Thread.MIN_PRIORITY);
		
		t2.start();
		t3.start();
		t4.start();
		t5.start();
		t6.start();
		t7.start();
	}
}

class MyPriority implements Runnable{
	@Override
	public void run() {
		System.out.println(Thread.currentThread().getName()+"--"+Thread.currentThread().getPriority());
		Thread.yield();	
	}
	
}