JAVA高级编程之线程池

线程池

 用于创建多个线程

一基本步骤：

1. 提供指定线程数量的线程池
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
3. 关闭连接池

补充：ExecutorService：真正的线程池接口。常见子类ThreadPoolExecutor

二、例题展示

package com.cn.java3;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadPoolExecutor;

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     ExecutorSevice 是接口
        ExecutorService service = Executors.newFixedThreadPool(10);
        ThreadPoolExecutor service1 = (ThreadPoolExecutor) service;//这里进行强制转换为类，便于进行属性的设置。
        //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());//适合适用于Runnable
        service.execute(new NumberThread1());//适合适用于Runnable

//        service.submit(Callable callable);//适合使用于Callable
        //3.关闭连接池
        service.shutdown();
    }

}

就到这里啦，谢谢大家❥(^_-)