/*

* 实现java.util.concurrent.Callable接口的类，可以被线程执行，并且还可以返回值

* 返回String

*/

public class Demo_04ThreadCallable implements Callable<String> {

?public String call() {

??System.out.println("实现Callable接口的线程实现");

??return "abc";

?}

}

public class Demo_02Runnable implements Runnable {

?public void run() {

??System.out.println(Thread.currentThread().getName() + "  线程池");

?}

}

public class Demo_03Thread {

?public static void main(String[] args) throws Exception {

??ExecutorService service = Executors.newFixedThreadPool(2);

??// 提交线程,实现Callable接口实现类对象， submit返回 Future接口的实现类对象

??Future<String> f = service.submit(newDemo_04ThreadCallable());

??// 调用Future接口的实现类对象方法 get

??String s = f.get();

??System.out.println(s);

??// submit可以提交Runnable接口的实现类，获取返回值，但是， run方法，void

??Future f1 = service.submit(new Runnable() {

???public void run() {

???}

??});

??System.out.println(f1.get());

?}

}