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

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

You can also browse Jackson Databind Source Code below:

⏎ com/fasterxml/jackson/databind/annotation/NoClass.java

package com.fasterxml.jackson.databind.annotation;

/**
 * Marker class used with annotations to indicate "no class". This is
 * a silly but necessary work-around -- annotations cannot take nulls
 * as either default or explicit values. Hence for class values we must
 * explicitly use a bogus placeholder to denote equivalent of
 * "no class" (for which 'null' is usually the natural choice).
 *<p>
 * Note that since 2.4, most (but not all!
 * {@link com.fasterxml.jackson.annotation.JsonTypeInfo#defaultImpl} is
 * a notable exception}) usage should start using
 * {@link java.lang.Void} instead as the "not defined" marker.
 */
public final class NoClass
{
    private NoClass() { }
}

⏎ com/fasterxml/jackson/databind/annotation/NoClass.java

Or download all of them as a single archive file:

File name: jackson-databind-2.14.0-sources.jar
File size: 1187952 bytes
Release date: 2022-11-05
Download 

⇒ Jackson Annotations Source Code

⇐ Download and Install Jackson Binary Package

⇑ Downloading and Reviewing jackson-*.jar

⇑⇑ Jackson - Java JSON library