Jackson is "the Java JSON library" or "the best JSON parser for Java". Or simply as "JSON for Java".

Jackson Annotations Source Code files are provided in the source packge (jackson-annotations-2.14.0-sources.jar). You can download it at Jackson Maven Website.

You can also browse Jackson Annotations Source Code below:

⏎ com/fasterxml/jackson/annotation/package-info.java

/**
 * Public core annotations, most of which are used to configure how
 * Data Mapping/Binding works. Annotations in this package can only
 * have dependencies to non-annotation classes in Core package;
 * annotations that have dependencies to Mapper classes are included
 * in Mapper module (under <code>org.codehaus.jackson.map.annotate</code>).
 * Also contains parameter types (mostly enums) needed by annotations.
 *<p>
 * Note that prior versions (1.x) contained these annotations within
 * 'core' jar, as part of Streaming API.
 */
package com.fasterxml.jackson.annotation;

⏎ com/fasterxml/jackson/annotation/package-info.java

Or download all of them as a single archive file:

File name: jackson-annotations-2.14.0-sources.jar
File size: 80402 bytes
Release date: 2022-11-05
Download 

⇒ Jackson Dataformat Extensions

⇐ Jackson Data Binding Source Code

⇑ Downloading and Reviewing jackson-*.jar

⇑⇑ Jackson - Java JSON library