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/introspect/Annotated.java

package com.fasterxml.jackson.databind.introspect;

import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Modifier;

import com.fasterxml.jackson.databind.JavaType;

/**
 * Shared base class used for anything on which annotations (included
 * within a {@link AnnotationMap}).
 */
public abstract class Annotated
{
    protected Annotated() { }

    public abstract <A extends Annotation> A getAnnotation(Class<A> acls);

    public abstract boolean hasAnnotation(Class<?> acls);

    /**
     * @since 2.7
     */
    public abstract boolean hasOneOf(Class<? extends Annotation>[] annoClasses);

    /**
     * Method that can be used to find actual JDK element that this instance
     * represents. It is non-null, except for method/constructor parameters
     * which do not have a JDK counterpart.
     */
    public abstract AnnotatedElement getAnnotated();

    protected abstract int getModifiers();

    public boolean isPublic() {
        return Modifier.isPublic(getModifiers());
    }

    public abstract String getName();

    /**
     * Full generic type of the annotated element; definition
     * of what exactly this means depends on sub-class.
     *
     * @since 2.7
     */
    public abstract JavaType getType();

    /**
     * "Raw" type (type-erased class) of the annotated element; definition
     * of what exactly this means depends on sub-class.
     */
    public abstract Class<?> getRawType();

    /**
     * Accessor that can be used to iterate over all the annotations
     * associated with annotated component.
     *
     * @since 2.3
     * @deprecated Since 2.9 should instead use {@link #getAnnotated()}
     */
    @Deprecated
    public abstract Iterable<Annotation> annotations();

    // Also: ensure we can use #equals, #hashCode
    
    @Override
    public abstract boolean equals(Object o);

    @Override
    public abstract int hashCode();

    @Override
    public abstract String toString();
}

⏎ com/fasterxml/jackson/databind/introspect/Annotated.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