如何使方法返回类型为Callable<Boolean>

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

public class Example {
    public static Callable<Boolean> createCallable() {
        return new Callable<Boolean>() {
            @Override
            public Boolean call() throws Exception {
                // 执行具体的逻辑
                boolean result = true;
                // 返回Boolean结果
                return result;
            }
        };
    }

    public static void main(String[] args) throws Exception {
        // 创建ExecutorService对象
        ExecutorService executorService = Executors.newSingleThreadExecutor();

        // 提交Callable任务并获取Future对象
        Future<Boolean> future = executorService.submit(createCallable());

        // 获取Callable任务的执行结果
        Boolean result = future.get();

        // 输出结果
        System.out.println(result);

        // 关闭ExecutorService
        executorService.shutdown();
    }
}