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/jsonFormatVisitors/JsonNumberFormatVisitor.java

package com.fasterxml.jackson.databind.jsonFormatVisitors;

import com.fasterxml.jackson.core.JsonParser;

public interface JsonNumberFormatVisitor extends JsonValueFormatVisitor
{
    /**
     * Method called to provide more exact type of number being serialized
     * (regardless of logical type, which may be {@link java.util.Date} or
     * {@link java.lang.Enum}, in addition to actual numeric types like
     * {@link java.lang.Integer}).
     */
    public void numberType(JsonParser.NumberType type);

    /**
     * Default "empty" implementation, useful as the base to start on;
     * especially as it is guaranteed to implement all the method
     * of the interface, even if new methods are getting added.
     */
    public static class Base extends JsonValueFormatVisitor.Base
        implements JsonNumberFormatVisitor {
        @Override
        public void numberType(JsonParser.NumberType type) { }
    }
}

⏎ com/fasterxml/jackson/databind/jsonFormatVisitors/JsonNumberFormatVisitor.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