Google Cloud Java Client for Translate

Java idiomatic client for Google Translate.

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• API Documentation

Note: This client is a work-in-progress, and may occasionally make backwards-incompatible changes.

Quickstart

If you are using Maven, add this to your pom.xml file

<dependency>
  <groupId>com.google.cloud</groupId>
  <artifactId>google-cloud-translate</artifactId>
  <version>0.8.1-alpha</version>
</dependency>

If you are using Gradle, add this to your dependencies

compile 'com.google.cloud:google-cloud-translate:0.8.1-alpha'

If you are using SBT, add this to your dependencies

libraryDependencies += "com.google.cloud" % "google-cloud-translate" % "0.8.1-alpha"

Example Application

TranslateExample is a simple command line interface that provides some of Google Translate's functionality. Read more about using the application on the TranslateExample docs page.

Authentication

Google Translate requires an API key to be passed with every request. For instructions on how to get an API key follow the Translate quickstart.

About Google Translate

Google Translate provides a simple programmatic interface for translating an arbitrary string into any supported language. Translate is highly responsive, so websites and applications can integrate with Translate API for fast, dynamic translation of source text from the source language to a target language (e.g., French to English). Language detection is also available In cases where the source language is unknown.

See the Translate quickstart for more details on how to activate Google Translate for your project.

See the google-cloud API Translate documentation to learn how to interact with the Google Translate using this Client Library.

Getting Started

Prerequisites

For this tutorial, you need a Google Developers Console project with "Translate API" enabled via the console's API Manager. You also need to enable billing via the Google Developers Console.

Finally, you must set up the local development environment by installing the Google Cloud SDK and running the following command in command line: gcloud auth application-default login. Alternatively, you can authenticate Translate requests using an API key. See Translate quickstart for more details.

Installation and setup

You'll need to obtain the google-cloud-translate library. See the Quickstart section to add google-cloud-translate as a dependency in your code.

Creating an authorized service object

To make authenticated requests to Google Translate, you must create a service object with credentials or with an API key. The simplest way to authenticate is to use Application Default Credentials. These credentials are automatically inferred from your environment, so you only need the following code to create your service object:

import com.google.cloud.translate.Translate;
import com.google.cloud.translate.TranslateOptions;

Translate translate = TranslateOptions.getDefaultInstance().getService();

Notice that this code can be also used with an API key. By default, an API key is looked for in the GOOGLE_API_KEY environment variable. Once the API key is set, you can make API calls by invoking methods on the Translate service created via TranslateOptions.getDefaultInstance().getService().

You can also explicitly set the API key as follows:

Translate translate = TranslateOptions.newBuilder().setApiKey("myKey").getService();

Detecting language

With Google Translate you can detect the language of some text. The service will provide you with the code of the detected language and a level of confidence.

Add the following import at the top of your file:

import com.google.cloud.translate.Detection;

Then add the following code to detect the text's language:

String detectedLanguage = detection.getLanguage();

Translating text

Google translate allows you to translate some text. When translating one or more texts you can either provide the source language or let the service detect it for you.

Add the following imports at the top of your file:

import com.google.cloud.translate.Translate.TranslateOption;
import com.google.cloud.translate.Translation;

Then add the following code to translate a text (specifying its source language):

Translation translation = translate.translate(
    "World",
    TranslateOption.sourceLanguage("en"),
    TranslateOption.targetLanguage(detectedLanguage));

Complete source code

In DetectLanguageAndTranslate.java we put together all the code shown above into one program. The program assumes that either default application credentials or a valid api key are available.

Troubleshooting

To get help, follow the instructions in the shared Troubleshooting document.

Java Versions

Java 7 or above is required for using this client.

Testing

This library has tools to help make tests for code using Cloud Translate.

See TESTING to read more about testing.

Versioning

This library follows Semantic Versioning.

It is currently in major version zero (0.y.z), which means that anything may change at any time and the public API should not be considered stable.

Contributing

Contributions to this library are always welcome and highly encouraged.

See google-cloud's CONTRIBUTING documentation and the shared documentation for more information on how to get started.

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms. See Code of Conduct for more information.

License

Apache 2.0 - See LICENSE for more information.