线程池的使用方法

线程池

主要是为了提升性能，线程重复利用。每个线程都创建十分消耗性能。线程池就像共享单车。

package Thread;

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

public class TestThreadPool {
    public static void main(String[] args) {
        ExecutorService service = Executors.newFixedThreadPool (10);//第一步
        service.execute (new MyThread ());//第二部
        service.execute (new MyThread ());
        service.execute (new MyThread ());
        service.execute (new MyThread ());
        service.submit (new MyThread ());//有返回值，但是我也不知道怎么用？
        service.shutdown ();//关闭线程池
    }
}
class MyThread implements Runnable{
    @Override
    public void run() {
        System.out.println (Thread.currentThread ().getName ());
    }
}