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feat: Add write API to java CL
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‎CHANGELOG.md‎

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and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
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## [Unreleased]
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### Added
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* Added support for the Write API in the client library, the implementation
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can be found in the `DeepLClient` class. Please refer to the README for usage
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instructions.
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### Changed
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* The main functionality of the library is now also exposed via the `DeepLClient`
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class. Please change your code to use this over the `Translator` class whenever
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convenient.
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## [1.7.0] - 2024-11-15
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### Added
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* Added `modelType` option to `translateText()` to use models with higher
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Initial version.
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[Unreleased]: https://github.com/DeepLcom/deepl-java/compare/v1.7.0...HEAD
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[1.7.0]: https://github.com/DeepLcom/deepl-java/compare/v1.6.0...v1.7.0
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[1.6.0]: https://github.com/DeepLcom/deepl-java/compare/v1.5.1...v1.6.0
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[1.5.1]: https://github.com/DeepLcom/deepl-java/compare/v1.5.0...v1.5.1

‎README.md‎

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‎deepl-java/src/main/java/com/deepl/api/DeepLClient.java‎

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// Copyright 2025 DeepL SE (https://www.deepl.com)
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// Use of this source code is governed by an MIT
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// license that can be found in the LICENSE file.
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package com.deepl.api;
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import com.deepl.api.http.HttpResponse;
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import com.deepl.api.utils.KeyValuePair;
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import java.util.ArrayList;
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import java.util.List;
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import org.jetbrains.annotations.Nullable;
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public class DeepLClient extends Translator {
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/** {@inheritDoc} */
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public DeepLClient(String authKey, TranslatorOptions options) throws IllegalArgumentException {
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super(authKey, options);
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}
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public WriteResult rephraseText(
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String text, @Nullable String targetLang, @Nullable TextRephraseOptions options)
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throws InterruptedException, DeepLException {
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ArrayList<String> texts = new ArrayList<>();
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texts.add(text);
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return this.rephraseText(texts, targetLang, options).get(0);
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}
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public List<WriteResult> rephraseText(
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List<String> texts, @Nullable String targetLang, @Nullable TextRephraseOptions options)
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throws InterruptedException, DeepLException {
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Iterable<KeyValuePair<String, String>> params =
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createWriteHttpParams(texts, targetLang, options);
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HttpResponse response = httpClientWrapper.sendRequestWithBackoff("/v2/write/rephrase", params);
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checkResponse(response, false, false);
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return jsonParser.parseWriteResult(response.getBody());
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}
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protected static ArrayList<KeyValuePair<String, String>> createWriteHttpParams(
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List<String> texts, @Nullable String targetLang, @Nullable TextRephraseOptions options) {
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targetLang = LanguageCode.standardize(targetLang);
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checkValidLanguages(null, targetLang);
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ArrayList<KeyValuePair<String, String>> params = new ArrayList<>();
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if (targetLang != null) {
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params.add(new KeyValuePair<>("target_lang", targetLang));
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}
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if (options != null && options.getWritingStyle() != null) {
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params.add(new KeyValuePair<>("writing_style", options.getWritingStyle()));
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}
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if (options != null && options.getTone() != null) {
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params.add(new KeyValuePair<>("tone", options.getTone()));
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}
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texts.forEach(
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(text) -> {
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if (text.isEmpty()) throw new IllegalArgumentException("text must not be empty");
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params.add(new KeyValuePair<>("text", text));
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});
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return params;
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}
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}

‎deepl-java/src/main/java/com/deepl/api/DeepLClientOptions.java‎

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// Copyright 2025 DeepL SE (https://www.deepl.com)
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// Use of this source code is governed by an MIT
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// license that can be found in the LICENSE file.
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package com.deepl.api;
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/** {@inheritDoc} */
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public class DeepLClientOptions extends TranslatorOptions {}

‎deepl-java/src/main/java/com/deepl/api/TextRephraseOptions.java‎

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// Copyright 2025 DeepL SE (https://www.deepl.com)
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// Use of this source code is governed by an MIT
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// license that can be found in the LICENSE file.
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package com.deepl.api;
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/**
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* Options to control text rephrasing behaviour. These options may be provided to {@link
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* DeepLClient#rephraseText} overloads.
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*
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* <p>All properties have corresponding setters in fluent-style, so the following is possible:
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* <code>
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* TextRephraseOptions options = new TextRephraseOptions()
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* .WritingStyle(WritingStyle.Business.getValue());
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* </code>
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*/
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public class TextRephraseOptions {
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private String writingStyle;
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private String tone;
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/**
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* Sets a style the improved text should be in. Note that only style OR tone can be set.
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*
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* @see WritingStyle
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*/
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public TextRephraseOptions setWritingStyle(String style) {
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this.writingStyle = style;
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return this;
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}
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/**
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* Sets a tone the improved text should be in. Note that only style OR tone can be set.
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*
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* @see WritingTone
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*/
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public TextRephraseOptions setTone(String tone) {
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this.tone = tone;
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return this;
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}
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/** Gets the current style setting. */
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public String getWritingStyle() {
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return writingStyle;
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}
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/** Gets the current tone setting. */
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public String getTone() {
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return tone;
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}
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}

‎deepl-java/src/main/java/com/deepl/api/Translator.java‎

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* Client for the DeepL API. To use the DeepL API, initialize an instance of this class using your
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* DeepL Authentication Key as found in your <a href="https://www.deepl.com/pro-account/">DeepL
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* account</a>.
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*
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* @deprecated Use {@link DeepLClient} instead.
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*/
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@Deprecated
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public class Translator {
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/** Base URL for DeepL API Free accounts. */
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private static final String DEEPL_SERVER_URL_FREE = "https://api-free.deepl.com";
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/** Base URL for DeepL API Pro accounts */
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private static final String DEEPL_SERVER_URL_PRO = "https://api.deepl.com";
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private final Parser jsonParser = new Parser();
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private final HttpClientWrapper httpClientWrapper;
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protected final Parser jsonParser = new Parser();
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protected final HttpClientWrapper httpClientWrapper;
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/**
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* Initializes a new Translator object using your Authentication Key.
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* @param options Options influencing translation.
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* @return Iterable of parameters for HTTP request.
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*/
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private static ArrayList<KeyValuePair<String, String>> createHttpParams(
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protected static ArrayList<KeyValuePair<String, String>> createHttpParams(
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String sourceLang, String targetLang, DocumentTranslationOptions options) {
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return createHttpParamsCommon(
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sourceLang,
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* @param glossaryId ID of glossary to use for translation.
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* @return Iterable of parameters for HTTP request.
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*/
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private static ArrayList<KeyValuePair<String, String>> createHttpParamsCommon(
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protected static ArrayList<KeyValuePair<String, String>> createHttpParamsCommon(
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@Nullable String sourceLang,
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String targetLang,
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@Nullable Formality formality,
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* @param targetLang Language code of the desired output language.
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* @throws IllegalArgumentException If either language code is invalid.
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*/
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private static void checkValidLanguages(@Nullable String sourceLang, String targetLang)
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protected static void checkValidLanguages(@Nullable String sourceLang, String targetLang)
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throws IllegalArgumentException {
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if (sourceLang != null && sourceLang.isEmpty()) {
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throw new IllegalArgumentException("sourceLang must be null or non-empty");
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* @throws DeepLException Throws {@link DeepLException} or a derived exception depending on the
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* type of error.
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*/
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private void checkResponse(
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protected void checkResponse(
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HttpResponse response, boolean inDocumentDownload, boolean usingGlossary)
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throws DeepLException {
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if (response.getCode() >= 200 && response.getCode() < 300) {

‎deepl-java/src/main/java/com/deepl/api/TranslatorOptions.java‎

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* TranslatorOptions options = new TranslatorOptions()
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* .setTimeout(Duration.ofSeconds(1)).setMaxRetries(2);
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* </code>
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*
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* @deprecated Use {@link DeepLClientOptions} instead.
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*/
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@Deprecated
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public class TranslatorOptions {
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private int maxRetries = 5;
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private Duration timeout = Duration.ofSeconds(10);

‎deepl-java/src/main/java/com/deepl/api/WriteResult.java‎

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// Copyright 2025 DeepL SE (https://www.deepl.com)
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// Use of this source code is governed by an MIT
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// license that can be found in the LICENSE file.
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package com.deepl.api;
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/** The result of a text translation. */
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public class WriteResult {
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private final String text;
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private final String detectedSourceLanguage;
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private final String targetLanguage;
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/** Constructs a new instance. */
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public WriteResult(String text, String detectedSourceLanguage, String targetLanguage) {
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this.text = text;
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this.detectedSourceLanguage = LanguageCode.standardize(detectedSourceLanguage);
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this.targetLanguage = targetLanguage;
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}
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/** The translated text. */
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public String getText() {
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return text;
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}
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/** The language code of the source text detected by DeepL. */
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public String getDetectedSourceLanguage() {
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return detectedSourceLanguage;
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}
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/** The language code of the target language set by the request. */
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public String getTargetLanguage() {
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return targetLanguage;
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}
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}

‎deepl-java/src/main/java/com/deepl/api/WritingStyle.java‎

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// Copyright 2025 DeepL SE (https://www.deepl.com)
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// Use of this source code is governed by an MIT
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// license that can be found in the LICENSE file.
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package com.deepl.api;
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/** Represents the style the improved text should be in in a rephrase request. */
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public enum WritingStyle {
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Academic("academic"),
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Business("business"),
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Casual("casual"),
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Default("default"),
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PreferAcademic("prefer_academic"),
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PreferBusiness("prefer_business"),
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PreferCasual("prefer_casual"),
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PreferSimple("prefer_simple"),
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Simple("simple");
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private final String value;
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WritingStyle(String value) {
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this.value = value;
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}
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public String getValue() {
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return value;
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}
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}

‎deepl-java/src/main/java/com/deepl/api/WritingTone.java‎

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// Copyright 2025 DeepL SE (https://www.deepl.com)
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// Use of this source code is governed by an MIT
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// license that can be found in the LICENSE file.
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package com.deepl.api;
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/** Represents the tone the improved text should be in in a rephrase request. */
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public enum WritingTone {
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Confident("confident"),
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Default("default"),
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Diplomatic("diplomatic"),
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Enthusiastic("enthusiastic"),
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Friendly("friendly"),
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PreferConfident("prefer_confident"),
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PreferDiplomatic("prefer_diplomatic"),
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PreferEnthusiastic("prefer_enthusiastic"),
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PreferFriendly("prefer_friendly");
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private final String value;
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WritingTone(String value) {
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this.value = value;
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}
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public String getValue() {
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return value;
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}
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}

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