package bunny.async;

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

public class FutureTest {
    public static void main(String[] args) throws Exception {
        try (ExecutorService executorService = Executors.newSingleThreadExecutor()) {
            Future<Integer> future = executorService.submit(() -> {
                // 模拟一个耗时的计算任务
                Thread.sleep(1000);
                return 42;
            });

            // 检查任务是否完成
            if (future.isDone()) {
                // 等待任务执行完成并获取结果
                Integer result = future.get();
                System.out.println("任务结果: " + result);
            } else {
                System.out.println("任务尚未完成");
            }

            Integer result = future.get();
            System.out.println("任务结果: " + result);

            executorService.shutdown();
        }
    }
}