자바 ExecutorService2

package main.java.com;

import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

public class ExecutorServiceMain2 {
    public static void main(String[] args) throws ExecutionException, InterruptedException {
        System.out.println("start");

        //쓰레드 픽스.
        ExecutorService executorService = Executors.newFixedThreadPool(10);
        Future<String> result = executorService.submit(() -> {
            return "s";
        });

        System.out.println("end1");

        //실행 완료 체크.
        System.out.println( result.isDone());
        String s = result.get();
        System.out.println(s);
        System.out.println( result.isDone());
        System.out.println("end2");
    }
}