* 使用future进行异步编程
* 缺点:
* 不知道何时结束
* 阻塞获取结果
import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import java.util.concurrent.Future;public class T01_Future {public static void main(String[] args) throws Exception {ExecutorService service = Executors.newCachedThreadPool();Future<Integer> future = service.submit(()->{return 8;});int i = future.get();System.out.println(i);}}
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