package top.qaqaq.java.P446;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadPoolExecutor;
/**
* 创建线程的方式四:使用线程池
*
* 好处:
* 1.提高响应速度(减少了创建新线程的时间)
* 2.降低资源消耗(重复利用线程池中线程,不需要每次都创建)
* 3.便于线程管理
* corePoolSize:核心池的大小
* maximumPoolSize:最大线程数
* keepAliveTime:线程没有任务时最多保持多长时间后会终止
* …
*
*
* 面试题:创建多线程有几种方式?四种!
*
* @author RichieZhang
* @create 2022-10-21 下午 10:20
*/
class NumberThread implements Runnable{
@Override
public void run() {
for (int i = 0; i <= 100; i++) {
if(i % 2 == 0){
System.out.println(Thread.currentThread().getName() + ":" + i);
}
}
}
}
class NumberThread1 implements Runnable{
@Override
public void run() {
for (int i = 0; i <= 100; i++) {
if(i % 2 != 0){
System.out.println(Thread.currentThread().getName() + ":" + i);
}
}
}
}
public class ThreadPool {
public static void main(String[] args) {
//1. 提供指定线程数量的线程池
ExecutorService service = Executors.newFixedThreadPool(10);
ThreadPoolExecutor service1 = (ThreadPoolExecutor) service;
//设置线程池的属性
// System.out.println(service.getClass());
// service1.setCorePoolSize(15);
// service1.setKeepAliveTime();
//2. 执行指定的线程的操作。需要提供实现Runnable接口或Callable接口实现类的对象
service.execute(new NumberThread());//适合使用于Runnable
service.execute(new NumberThread1());//适合使用于Runnable
// service.submit(Callable callable);//适合使用于Callable
//3. 关闭连接池
service.shutdown();
}
}
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