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Jackson vs FF4J: What are the differences?
Developers describe Jackson as "A suite of data-processing tools for Java". It is a suite of data-processing tools for Java (and the JVM platform), including the flagship streaming JSON parser / generator library, matching data-binding library (POJOs to and from JSON) and additional data format modules to process data encoded in Avro, BSON, CBOR, CSV, Smile, (Java) Properties, Protobuf, XML or YAML; and even the large set of data format modules to support data types of widely used data types such as Guava, Joda. On the other hand, FF4J is detailed as "Feature Flags for Java made easy". It is an implementation of Feature Toggle pattern : Enable and disable features or your applications at runtime thanks to dedicated web console, REST API, JMX or even CLI. It handle also properties and provide generic interfaces.
Jackson and FF4J are primarily classified as "Java" and "Feature Flags Management" tools respectively.
Jackson is an open source tool with 5.78K GitHub stars and 1K GitHub forks. Here's a link to Jackson's open source repository on GitHub.