多线程.线程池

ExecutorService和Executors
ExecutorService：真正的线程池接口。常见子类ThreadPoolExecutor
void execute（Runnable command）：执行任务/命令，没有返回值，一般用来执行Runnable
<T>Future<T>submit(Callable<T>tast):执行任务，有返回值，一般用来执行Callable
void shutdown()：关闭连接池
Executors：工具类、线程池的工厂类，用于创建并返回不同类型的线程池

package oop.dxcgaoji;

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

//测试线程池
public class TestPool {
    public static void main(String[] args) {
        //1.创建服务，创建线程池
        //newFixedThreadPool 参数为：线程池大小
        ExecutorService service = Executors.newFixedThreadPool(10);
        service.execute(new MyThread());
        service.execute(new MyThread());
        service.execute(new MyThread());
        service.execute(new MyThread());
        //2.关闭链接
        service.shutdown();
    }
}

class MyThread implements Runnable{
    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName());
    }
}