# New ES Java API: Getting index name from alias name

**URL:** <https://discuss.elastic.co/t/new-es-java-api-getting-index-name-from-alias-name/309643>\
**Category:** Elasticsearch\
**Tags:** language-clients\
**Created:** [July 14, 2022, 12:29pm UTC](https://discuss.elastic.co/t/new-es-java-api-getting-index-name-from-alias-name/309643 "2022-07-14T12:29:13Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![ALX\_DM](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/alx_dm/32/106314_2.png) [@ALX\_DM](https://discuss.elastic.co/u/ALX_DM)\
**Post date:** [July 14, 2022, 12:29pm UTC](https://discuss.elastic.co/t/new-es-java-api-getting-index-name-from-alias-name/309643/1 "2022-07-14T12:29:13Z")

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I dont really understand how to get index name from alias name looking only at the api code of new elastic Java API.

I cannot find any document also.

Hope somebody here have tried.

Here`s what I tried so far:

```auto
final GetAliasRequest req = new GetAliasRequest.Builder().build(); ----> but I dont know where to specify the alias name

final GetAliaseResponse res = client.indices().getAlias(req) ; ---> not sure also here

-----> dont know what follows

```

Any help is appreciated.

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<div class="post-metadata">

**Author:** ![ALX\_DM](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/alx_dm/32/106314_2.png) [@ALX\_DM](https://discuss.elastic.co/u/ALX_DM)\
**Post date:** [July 14, 2022, 2:02pm UTC](https://discuss.elastic.co/t/new-es-java-api-getting-index-name-from-alias-name/309643/2 "2022-07-14T14:02:02Z")

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What I want is how to implement this in code

GET \_alias/aliasName

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<div class="post-metadata">

**Author:** ![ALX\_DM](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/alx_dm/32/106314_2.png) [@ALX\_DM](https://discuss.elastic.co/u/ALX_DM)\
**Post date:** [July 14, 2022, 2:26pm UTC](https://discuss.elastic.co/t/new-es-java-api-getting-index-name-from-alias-name/309643/3 "2022-07-14T14:26:20Z")

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I will answer my own question hahaha, I discover it:

```auto
GetAliasRequest request = new GetAliasRequest.Builder().name(aliasName).build();
GetAliasResponse response = client.indices().getAlias(request);

String indexName = response.result.keySet().stream().findFirst();

```

That's it!

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [August 11, 2022, 2:26pm UTC](https://discuss.elastic.co/t/new-es-java-api-getting-index-name-from-alias-name/309643/4 "2022-08-11T14:26:42Z")

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