[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[],[],null,["# Class Key.Builder (2.31.2)\n\nVersion latestkeyboard_arrow_down\n\n- [2.31.2 (latest)](/java/docs/reference/google-cloud-datastore/latest/com.google.cloud.datastore.Key.Builder)\n- [2.31.1](/java/docs/reference/google-cloud-datastore/2.31.1/com.google.cloud.datastore.Key.Builder)\n- [2.30.0](/java/docs/reference/google-cloud-datastore/2.30.0/com.google.cloud.datastore.Key.Builder)\n- [2.29.1](/java/docs/reference/google-cloud-datastore/2.29.1/com.google.cloud.datastore.Key.Builder)\n- [2.28.2](/java/docs/reference/google-cloud-datastore/2.28.2/com.google.cloud.datastore.Key.Builder)\n- [2.27.1](/java/docs/reference/google-cloud-datastore/2.27.1/com.google.cloud.datastore.Key.Builder)\n- [2.26.4](/java/docs/reference/google-cloud-datastore/2.26.4/com.google.cloud.datastore.Key.Builder)\n- [2.25.2](/java/docs/reference/google-cloud-datastore/2.25.2/com.google.cloud.datastore.Key.Builder)\n- [2.24.3](/java/docs/reference/google-cloud-datastore/2.24.3/com.google.cloud.datastore.Key.Builder)\n- [2.23.0](/java/docs/reference/google-cloud-datastore/2.23.0/com.google.cloud.datastore.Key.Builder)\n- [2.22.0](/java/docs/reference/google-cloud-datastore/2.22.0/com.google.cloud.datastore.Key.Builder)\n- [2.21.3](/java/docs/reference/google-cloud-datastore/2.21.3/com.google.cloud.datastore.Key.Builder)\n- [2.20.2](/java/docs/reference/google-cloud-datastore/2.20.2/com.google.cloud.datastore.Key.Builder)\n- [2.19.2](/java/docs/reference/google-cloud-datastore/2.19.2/com.google.cloud.datastore.Key.Builder)\n- [2.18.5](/java/docs/reference/google-cloud-datastore/2.18.5/com.google.cloud.datastore.Key.Builder)\n- [2.17.6](/java/docs/reference/google-cloud-datastore/2.17.6/com.google.cloud.datastore.Key.Builder) \n\n public static final class Key.Builder extends BaseKey.Builder\u003cKey.Builder\u003e\n\nInheritance\n-----------\n\n[java.lang.Object](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html) \\\u003e [BaseKey.Builder](/java/docs/reference/google-cloud-datastore/latest/com.google.cloud.datastore.BaseKey.Builder) \\\u003e Key.Builder \n\nInherited Members\n-----------------\n\n[BaseKey.Builder.addAncestor(PathElement)](/java/docs/reference/google-cloud-datastore/latest/com.google.cloud.datastore.BaseKey.Builder#com_google_cloud_datastore_BaseKey_Builder_addAncestor_com_google_cloud_datastore_PathElement_) \n[BaseKey.Builder.addAncestors(PathElement,PathElement)](/java/docs/reference/google-cloud-datastore/latest/com.google.cloud.datastore.BaseKey.Builder#com_google_cloud_datastore_BaseKey_Builder_addAncestors_com_google_cloud_datastore_PathElement_com_google_cloud_datastore_PathElement____) \n[BaseKey.Builder.addAncestors(Iterable\\\u003cPathElement\\\u003e)](/java/docs/reference/google-cloud-datastore/latest/com.google.cloud.datastore.BaseKey.Builder#com_google_cloud_datastore_BaseKey_Builder_addAncestors_java_lang_Iterable_com_google_cloud_datastore_PathElement__) \n[BaseKey.Builder.build()](/java/docs/reference/google-cloud-datastore/latest/com.google.cloud.datastore.BaseKey.Builder#com_google_cloud_datastore_BaseKey_Builder_build__) \n[BaseKey.Builder.setDatabaseId(String)](/java/docs/reference/google-cloud-datastore/latest/com.google.cloud.datastore.BaseKey.Builder#com_google_cloud_datastore_BaseKey_Builder_setDatabaseId_java_lang_String_) \n[BaseKey.Builder.setKind(String)](/java/docs/reference/google-cloud-datastore/latest/com.google.cloud.datastore.BaseKey.Builder#com_google_cloud_datastore_BaseKey_Builder_setKind_java_lang_String_) \n[BaseKey.Builder.setNamespace(String)](/java/docs/reference/google-cloud-datastore/latest/com.google.cloud.datastore.BaseKey.Builder#com_google_cloud_datastore_BaseKey_Builder_setNamespace_java_lang_String_) \n[BaseKey.Builder.setProjectId(String)](/java/docs/reference/google-cloud-datastore/latest/com.google.cloud.datastore.BaseKey.Builder#com_google_cloud_datastore_BaseKey_Builder_setProjectId_java_lang_String_) \n[Object.clone()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#clone--) \n[Object.equals(Object)](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#equals-java.lang.Object-) \n[Object.finalize()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#finalize--) \n[Object.getClass()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#getClass--) \n[Object.hashCode()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#hashCode--) \n[Object.notify()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#notify--) \n[Object.notifyAll()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#notifyAll--) \n[Object.toString()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#toString--) \n[Object.wait()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait--) \n[Object.wait(long)](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-) \n[Object.wait(long,int)](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-int-)\n\nMethods\n-------\n\n### build()\n\n public Key build()\n\n**Overrides** \n[BaseKey.Builder\\\u003cB\\\u003e.build()](/java/docs/reference/google-cloud-datastore/latest/com.google.cloud.datastore.BaseKey.Builder#com_google_cloud_datastore_BaseKey_Builder_build__)\n\n### setId(long id)\n\n public Key.Builder setId(long id)\n\nSets the ID of this key.\n\n### setName(String name)\n\n public Key.Builder setName(String name)\n\nSets the name of this key."]]
