# All Packages

Package Summary
Package
Description
com.fasterxml.jackson.core
Main public API classes of the core streaming JSON processor: most importantly `JsonFactory` used for constructing JSON parser (`JsonParser`) and generator (`JsonGenerator`) instances.
com.fasterxml.jackson.core.async
Package that contains abstractions needed to support optional non-blocking decoding (parsing) functionality.
com.fasterxml.jackson.core.base
Base classes used by concrete Parser and Generator implementations; contain functionality that is not specific to JSON or input abstraction (byte vs char).
com.fasterxml.jackson.core.exc
Package for some of `JsonProcessingException` subtypes contained by streaming API.
com.fasterxml.jackson.core.filter
com.fasterxml.jackson.core.format
Package that contains interfaces needed for dynamic, pluggable format (auto)detection; as well as basic utility classes for simple format detection functionality.
com.fasterxml.jackson.core.io
com.fasterxml.jackson.core.json
JSON-specific parser and generator implementation classes that Jackson defines and uses.
com.fasterxml.jackson.core.json.async
Non-blocking ("async") JSON parser implementation.
com.fasterxml.jackson.core.sym
Internal implementation classes for efficient handling of of symbols in JSON (field names in Objects)
com.fasterxml.jackson.core.type
Contains classes needed for type introspection, mostly used by data binding functionality.
com.fasterxml.jackson.core.util
Utility classes used by Jackson Core functionality.