Java 为什么AmazonSClient Builder的withRegion（）不可见？

我正在编写代码，以便在Eclipse中创建一个AmazonWebServicesSNS客户机，这时我收到一个错误消息

从类型中选择Region（Region）的方法 AwsClientBuilder不可见

这是我的密码

package com.amazonaws.samples;

import java.util.Date;

import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.AWSStaticCredentialsProvider;
import com.amazonaws.auth.AnonymousAWSCredentials;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.client.builder.AwsClientBuilder;
import com.amazonaws.regions.Region;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.sns.AmazonSNS;
import com.amazonaws.services.sns.AmazonSNSClient;
import com.amazonaws.services.sns.AmazonSNSClientBuilder;
import com.amazonaws.services.sns.model.CreateTopicRequest;
import com.amazonaws.services.sns.model.CreateTopicResult;
import com.amazonaws.services.sns.model.PublishRequest;

// Example SNS Sender
public class Main {

    // AWS credentials -- replace with your credentials
    static String ACCESS_KEY = "<Your AWS Access Key>";
    static String SECRET_KEY = "<Your AWS Secret Key>";

    // Sender loop
    public static void main(String... args) throws Exception {

        // Create a client

        AWSCredentials awsCred = new AnonymousAWSCredentials();

        AWSStaticCredentialsProvider cred = new AWSStaticCredentialsProvider(awsCred);

        Region region = Region.getRegion(Regions.US_EAST_1);

        AmazonSNS service = AmazonSNSClientBuilder.standard().withRegion(region).withCredentials(cred).build(); // Error message: The method withRegion(Region) from the type AwsClientBuilder<AmazonSNSClientBuilder,AmazonSNS> is not visible

        // Create a topic
        CreateTopicRequest createReq = new CreateTopicRequest()
            .withName("MyTopic3");
        CreateTopicResult createRes = service.createTopic(createReq);

        for (;;) {

            // Publish to a topic
            PublishRequest publishReq = new PublishRequest()
                .withTopicArn(createRes.getTopicArn())
                .withMessage("Example notification sent at " + new Date());
            service.publish(publishReq);

            Thread.sleep(1000);
        }
    }
}

package com.amazonaws.samples；
导入java.util.Date；
导入com.amazonaws.auth.AWSCredentials；
导入com.amazonaws.auth.AWSStaticCredentialsProvider；
导入com.amazonaws.auth.AnonymousAWSCredentials；
导入com.amazonaws.auth.BasicAWSCredentials；
导入com.amazonaws.client.builder.AwsClientBuilder；
导入com.amazonaws.regions.Region；
导入com.amazonaws.regions.regions；
导入com.amazonaws.services.sns.AmazonSNS；
导入com.amazonaws.services.sns.amazonsClient；
导入com.amazonaws.services.sns.amazonsclientbuilder；
导入com.amazonaws.services.sns.model.CreateTopicRequest；
导入com.amazonaws.services.sns.model.CreateTopicResult；
导入com.amazonaws.services.sns.model.PublishRequest；
//示例SNS发送方
公共班机{
//AWS凭据--替换为您的凭据
静态字符串访问_KEY=“”；
静态字符串SECRET_KEY=“”；
//发送器环路
公共静态void main（字符串…参数）引发异常{
//创建客户机
AWSCredentials awsCred=新的匿名AWSCredentials（）；
AWSStaticCredentialsProvider cred=新的AWSStaticCredentialsProvider（awsCred）；
Region Region=Region.getRegion（Regions.US\u EAST\u 1）；
AmazonS服务=AmazonSClient Builder.standard（）.withRegion（region）.withCredentials（cred）.build（）；//错误消息：来自类型AwsClientBuilder的withRegion（region）方法

我应该检查什么来更正此问题？
您传递了错误的参数，
withRegion
采用
字符串或
区域（注意，不是
区域
，单数）

尝试通过
地区。EU_WEST_1

两个
amazonsclientbuilder.standard（）.withRegion（Regions.EU_WEST_1.build（）；

和
amazonsclientbuilder.standard（）.withRegion（“eu-west-1”）.build（）；

你对我来说很好