AWS Java 1.2

package aws.example.s3;

import com.amazonaws.regions.Regions;
import com.amazonaws.regions.Region;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;

import com.amazonaws.services.s3.model.Bucket;

import java.io.File;
import java.util.List;

public class S3Manager {

    public void createBucket() {
		Region region = Region.getRegion(Regions.AP_SOUTH_1);
		final AmazonS3 s3 = AmazonS3ClientBuilder.standard().withRegion(region).build();
        Bucket b = s3.createBucket("foo_bucket");
    }
	
	public void  putFile(String file_path) {
		Region region = Region.getRegion(Regions.AP_SOUTH_1);
		final AmazonS3 s3 = AmazonS3ClientBuilder.standard().withRegion(region).build();
		String key_name = Paths.get(file_path).getFileName().toString();
		s3.putObject("foo_bucket", key_name, new File(file_path));
	}
}

import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.lambda.AWSLambda;
import com.amazonaws.services.lambda.AWSLambdaClientBuilder;
import com.amazonaws.services.lambda.model.InvokeRequest;
import com.amazonaws.services.lambda.model.InvokeResult;
import com.amazonaws.services.lambda.model.ServiceException;

import java.nio.charset.StandardCharsets;

public class FooClass {   

    public static void invokeFunction(LambdaClient awsLambda, String functionName) {

        InvokeRequest invokeRequest = new InvokeRequest()
                .withFunctionName("functionName")
                .withPayload("{\n" +
                        " \"Hello \": \"Paris\",\n" +
                        " \"countryCode\": \"FR\"\n" +
                        "}");
        InvokeResult invokeResult = null;

        AWSLambda awsLambda = AWSLambdaClientBuilder.standard()
                                  .withCredentials(new ProfileCredentialsProvider())
                                  .withRegion(Regions.US_WEST_2).build();

        invokeResult = awsLambda.invoke(invokeRequest);
   }
}

// https://docs.aws.amazon.com/lambda/latest/dg/with-android-example.html
import com.amazonaws.mobileconnectors.lambdainvoker.LambdaFunction;
public interface MyInterface {

    /**
     * Invoke the Lambda function "AndroidBackendLambdaFunction". 
     * The function name is the method name.
     */
    @LambdaFunction
     ResponseClass AndroidBackendLambdaFunction(RequestClass request);

}

import com.amazonaws.services.s3.AmazonS3ClientBuilder;
import com.amazonaws.services.sns.AmazonSNS;
import com.amazonaws.services.sns.AmazonSNSClientBuilder;
import com.amazonaws.services.sns.model.PublishRequest;
import com.amazonaws.services.sns.model.CreateTopicRequest;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
import com.amazonaws.services.sns.model.SubscribeRequest;

public class Example {

    public static void main(String[] args) {
        final String TOPIC_NAME = "extended-client-topic";
        final Regions region = Regions.DEFAULT_REGION;

        final AmazonSNS snsClient = AmazonSNSClientBuilder.standard().withRegion(region).build();
        final String topicArn = snsClient.createTopic(
                new CreateTopicRequest().withName("TOPIC1")
        ).getTopicArn();
        snsClient.publish(topicArn, "message");
   }

    public static void subscribe(String[] args) {
        final String TOPIC_NAME = "extended-client-topic";
        final Regions region = Regions.DEFAULT_REGION;

        final AmazonSNS snsClient = AmazonSNSClientBuilder.standard().withRegion(region).build();
        final String topicArn1 = snsClient.createTopic(
                new CreateTopicRequest().withName("TOPIC1")
        ).getTopicArn();
        snsClient.subscribe(topicArn1, "email", "lili@lala.com");
        snsClient.subscribe(new SubscribeRequest(topicArn1, "email", "lili@lala.com"));
        snsClient.subscribe(new SubscribeRequest(topicArn1, "sqs", "arn:partition:service:region:account-id:queueName"));
        snsClient.subscribe(new SubscribeRequest()
                                   .setTopicArn(topicArn1)
                                   .setProtocol("http")
                                   .setEndpoint("http://foourl"));
        snsClient.subscribe(new SubscribeRequest()
                                   .withTopicArn(topicArn1)
                                   .withProtocol("lambda")
                                   .withEndpoint("fooarn:function:lambda_name:v2"));

    }
}