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The Realm Java SDK allows you to use Realm Database and backend Apps using Java or Kotlin.
Realm's Java SDK enables you to build apps for the following platforms:
Android Automotive OS
With the Realm Java SDK, you can access objects stored in a local instance of Realm Database. With Realm Database, you can:
Define your object schema with annotated Kotlin or Java classes:
Query for stored objects using Android-native queries:
Update objects in Realm Database by updating field values on an instance of the object within a transaction:
Receive object updates and notifications automatically when objects stored in Realm Database change:
Live objects keep all instances of an object up to date at all times:
To get started with Realm Database, try our Local-only Quick Start.
Atlas App Services is a backend for client applications hosted by MongoDB in the cloud. Individual backends, known as Apps, provide the ability to synchronize data stored in Realm Database as well as a layer of backend functionality including user accounts and backend logic. The Realm Java SDK optionally contains the ability to access these Apps running in the cloud. In addition to local Realm Database in the SDK, Apps provide the following functionality:
Automatically sync data between realms on client devices and your backend MongoDB Atlas data store with Device Sync:
Execute logic in your backend App from a client application using Functions.
React to events in your backend App using Triggers.
To get started with Realm, try the our Quick Start with Sync.
For practical code samples of common tasks in Realm Database and Apps, take a look at the Examples.
Realm Apps Examples