十、获取异步线程返回值Callable

import java.util.concurrent.*;

public class CallableDemo {

    public static void main(String[] args) throws ExecutionException, InterruptedException {
        ExecutorService executorService = Executors.newFixedThreadPool(1);
        Future<String> future = executorService.submit(() -> "return value");
        System.out.println(future.get());
        executorService.shutdown();
    }
}

return value