# Changes in working with DynamoDB from version 1 to version 2 of the AWS SDK for Java
<a name="migration-ddb-mapper"></a>



**Topics**
+ [DynamoDB mapping API differences between version 1 and version 2 of the AWS SDK for Java](ddb-mapping.md)
+ [Document API differences between version 1 and version 2 of the AWS SDK for Java](dynamodb-mapping-document-api.md)
+ [Encryption library migration](ddb-encryption-lib-migrate.md)