线程池

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

/**
 * @author lisa
 * @create 2020-08-11-16:19
 */
public class ExecutorTest {
    public static void main(String[] args) {
        ExecutorService service=Executors.newFixedThreadPool(10);
        //适合Callable 
        System.out.println(service.getClass());
        ThreadPoolExecutor the= (ThreadPoolExecutor) service;
        the.setCorePoolSize(15);
        

        service.submit(new Callable<Integer>() {
            @Override
            public Integer call() throws Exception {
                return null;
            }
        });//适合Callable（均可）
        service.execute(new Runnable() {
            @Override
            public void run() {

            }
        });//适合Runnable接口

    }
}