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

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

You can also browse Jackson Core Source Code below:

⏎ com/fasterxml/jackson/core/JacksonException.java

package com.fasterxml.jackson.core;

/**
 * Base class for all Jackson-produced checked exceptions.
 *<p>
 * For Jackson 2.x this base type is not widely used (instead, its main subtype
 * {@link JsonProcessingException} is): it is provided more for forwards-compatibility
 * purposes as 3.x will base all other types directly on it and deprecate
 * {@link JsonProcessingException} (as well as chance its type to unchecked).
 *
 * @since 2.12
 */
public abstract class JacksonException extends java.io.IOException
{
    private final static long serialVersionUID = 123; // eclipse complains otherwise

    protected JacksonException(String msg) {
        super(msg);
    }

    protected JacksonException(Throwable t) {
        super(t);
    }

    protected JacksonException(String msg, Throwable rootCause) {
        super(msg, rootCause);
        // 23-Sep-2020, tatu: before 2.12, had null checks for some reason...
        //   But I don't think that is actually required; Javadocs for
        //   `java.lang.Throwable` constructor claim {@code null} is fine.
/*        if (rootCause != null) {
            initCause(rootCause);
        }*/
    }

    /*
    /**********************************************************************
    /* Extended API
    /**********************************************************************
     */

    /**
     * Accessor for location information related to position within input
     * or output (depending on operation), if available; if not available
     * may return {@code null}.
     *<p>
     * Accuracy of location information depends on backend (format) as well
     * as (in some cases) operation being performed.
     *
     * @return Location in input or output that triggered the problem reported, if
     *    available; {@code null} otherwise.
     */
    public abstract JsonLocation getLocation();

    /**
     * Method that allows accessing the original "message" argument,
     * without additional decorations (like location information)
     * that overridden {@link #getMessage} adds.
     *
     * @return Original, unmodified {@code message} argument used to construct
     *    this exception instance
     */
    public abstract String getOriginalMessage();

    /**
     * Method that allows accessing underlying processor that triggered
     * this exception; typically either {@link JsonParser} or {@link JsonGenerator}
     * for exceptions that originate from streaming API, but may be other types
     * when thrown by databinding.
     *<p>
     * Note that it is possible that {@code null} may be returned if code throwing
     * exception either has no access to the processor; or has not been retrofitted
     * to set it; this means that caller needs to take care to check for nulls.
     * Subtypes override this method with co-variant return type, for more
     * type-safe access.
     * 
     * @return Originating processor, if available; {@code null} if not.
     */
    public abstract Object getProcessor();
}

⏎ com/fasterxml/jackson/core/JacksonException.java

Or download all of them as a single archive file:

File name: jackson-core-2.14.0-sources.jar
File size: 497693 bytes
Release date: 2022-11-05
Download 

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⇑ Downloading and Reviewing jackson-*.jar

⇑⇑ Jackson - Java JSON library