Callableインタフェースサンプル実装

CallableSample.java

import java.util.Date;
import java.util.concurrent.*;

/**
 * Created by eratakumi on 2017/05/31.
 */
public class CallableSample {
    public static void main(String[] args){
        ExecutorService ex = Executors.newSingleThreadExecutor();
        System.out.println("Start : " + new Date());
        Future<Date> future = ex.submit(new ThreadA());
        try {
            Date date = future.get();
            System.out.println("End   : " + date);
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }
        ex.shutdown();
    }
}
class ThreadA implements Callable<Date> {
    public Date call() throws Exception {
        Thread.sleep(3000);
        return new Date();
    }
}