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MongoDB Java Driver Documentation

Welcome to the MongoDB JVM driver documentation hub for the 4.2 drivers release.

What’s New in 4.2

For key new features of 4.2, see What’s New.


To upgrade, refer to the Upgrade Considerations documentation.

MongoDB Driver

For the synchronous MongoDB Driver, see MongoDB Driver section.

MongoDB Reactive Streams Driver

For the MongoDB Reactive Streams Driver, see MongoDB Reactive Streams Driver section.

MongoDB Scala Driver

For the MongoDB Scala Driver, see MongoDB Scala Driver section.

BSON Library

The BSON library comprehensively supports the BSON spec, the data storage and network transfer format that MongoDB uses for ‚Äúdocuments”. The reference guide provides information about working with Documents, how to use Codecs and Extended JSON support.