Amazon Polly examples using SDK for Java 2.x - AWS SDK for Java 2.x
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Amazon Polly examples using SDK for Java 2.x

The following code examples show you how to perform actions and implement common scenarios by using the AWS SDK for Java 2.x with Amazon Polly.

Actions are code excerpts from larger programs and must be run in context. While actions show you how to call individual service functions, you can see actions in context in their related scenarios and cross-service examples.

Scenarios are code examples that show you how to accomplish a specific task by calling multiple functions within the same service.

Each example includes a link to GitHub, where you can find instructions on how to set up and run the code in context.

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The following code example shows how to use DescribeVoices.

SDK for Java 2.x
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository. 

import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.polly.PollyClient;
import software.amazon.awssdk.services.polly.model.DescribeVoicesRequest;
import software.amazon.awssdk.services.polly.model.DescribeVoicesResponse;
import software.amazon.awssdk.services.polly.model.PollyException;
import software.amazon.awssdk.services.polly.model.Voice;
import java.util.List;

/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 */
public class DescribeVoicesSample {
    public static void main(String args[]) {
        PollyClient polly = PollyClient.builder()
                .region(Region.US_WEST_2)
                .build();

        describeVoice(polly);
        polly.close();
    }

    public static void describeVoice(PollyClient polly) {
        try {
            DescribeVoicesRequest voicesRequest = DescribeVoicesRequest.builder()
                    .languageCode("en-US")
                    .build();

            DescribeVoicesResponse enUsVoicesResult = polly.describeVoices(voicesRequest);
            List<Voice> voices = enUsVoicesResult.voices();
            for (Voice myVoice : voices) {
                System.out.println("The ID of the voice is " + myVoice.id());
                System.out.println("The gender of the voice is " + myVoice.gender());
            }

        } catch (PollyException e) {
            System.err.println("Exception caught: " + e);
            System.exit(1);
        }
    }
}

  • For API details, see DescribeVoices in AWS SDK for Java 2.x API Reference.

The following code example shows how to use ListLexicons.

SDK for Java 2.x
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository. 

import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.polly.PollyClient;
import software.amazon.awssdk.services.polly.model.ListLexiconsResponse;
import software.amazon.awssdk.services.polly.model.ListLexiconsRequest;
import software.amazon.awssdk.services.polly.model.LexiconDescription;
import software.amazon.awssdk.services.polly.model.PollyException;
import java.util.List;

/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 */
public class ListLexicons {
    public static void main(String args[]) {
        PollyClient polly = PollyClient.builder()
                .region(Region.US_WEST_2)
                .build();

        listLexicons(polly);
        polly.close();
    }

    public static void listLexicons(PollyClient client) {
        try {
            ListLexiconsRequest listLexiconsRequest = ListLexiconsRequest.builder()
                    .build();

            ListLexiconsResponse listLexiconsResult = client.listLexicons(listLexiconsRequest);
            List<LexiconDescription> lexiconDescription = listLexiconsResult.lexicons();
            for (LexiconDescription lexDescription : lexiconDescription) {
                System.out.println("The name of the Lexicon is " + lexDescription.name());
            }

        } catch (PollyException e) {
            System.err.println("Exception caught: " + e);
            System.exit(1);
        }
    }
}

  • For API details, see ListLexicons in AWS SDK for Java 2.x API Reference.

The following code example shows how to use SynthesizeSpeech.

SDK for Java 2.x
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository. 

import javazoom.jl.decoder.JavaLayerException;
import software.amazon.awssdk.core.ResponseInputStream;
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.polly.PollyClient;
import software.amazon.awssdk.services.polly.model.DescribeVoicesRequest;
import software.amazon.awssdk.services.polly.model.Voice;
import software.amazon.awssdk.services.polly.model.DescribeVoicesResponse;
import software.amazon.awssdk.services.polly.model.OutputFormat;
import software.amazon.awssdk.services.polly.model.PollyException;
import software.amazon.awssdk.services.polly.model.SynthesizeSpeechRequest;
import software.amazon.awssdk.services.polly.model.SynthesizeSpeechResponse;
import java.io.IOException;
import java.io.InputStream;
import javazoom.jl.player.advanced.AdvancedPlayer;
import javazoom.jl.player.advanced.PlaybackEvent;
import javazoom.jl.player.advanced.PlaybackListener;

/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 */
public class PollyDemo {
    private static final String SAMPLE = "Congratulations. You have successfully built this working demo " +
            " of Amazon Polly in Java Version 2. Have fun building voice enabled apps with Amazon Polly (that's me!), and always "
            +
            " look at the AWS website for tips and tricks on using Amazon Polly and other great services from AWS";

    public static void main(String args[]) {
        PollyClient polly = PollyClient.builder()
                .region(Region.US_WEST_2)
                .build();

        talkPolly(polly);
        polly.close();
    }

    public static void talkPolly(PollyClient polly) {
        try {
            DescribeVoicesRequest describeVoiceRequest = DescribeVoicesRequest.builder()
                    .engine("standard")
                    .build();

            DescribeVoicesResponse describeVoicesResult = polly.describeVoices(describeVoiceRequest);
            Voice voice = describeVoicesResult.voices().stream()
                    .filter(v -> v.name().equals("Joanna"))
                    .findFirst()
                    .orElseThrow(() -> new RuntimeException("Voice not found"));
            InputStream stream = synthesize(polly, SAMPLE, voice, OutputFormat.MP3);
            AdvancedPlayer player = new AdvancedPlayer(stream,
                    javazoom.jl.player.FactoryRegistry.systemRegistry().createAudioDevice());
            player.setPlayBackListener(new PlaybackListener() {
                public void playbackStarted(PlaybackEvent evt) {
                    System.out.println("Playback started");
                    System.out.println(SAMPLE);
                }

                public void playbackFinished(PlaybackEvent evt) {
                    System.out.println("Playback finished");
                }
            });

            // play it!
            player.play();

        } catch (PollyException | JavaLayerException | IOException e) {
            System.err.println(e.getMessage());
            System.exit(1);
        }
    }

    public static InputStream synthesize(PollyClient polly, String text, Voice voice, OutputFormat format)
            throws IOException {
        SynthesizeSpeechRequest synthReq = SynthesizeSpeechRequest.builder()
                .text(text)
                .voiceId(voice.id())
                .outputFormat(format)
                .build();

        ResponseInputStream<SynthesizeSpeechResponse> synthRes = polly.synthesizeSpeech(synthReq);
        return synthRes;
    }
}