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/deser/std/JdkDeserializers.java

package com.fasterxml.jackson.databind.deser.std;

import java.nio.ByteBuffer;
import java.util.*;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;

import com.fasterxml.jackson.databind.*;

/**
 * Container class that contains serializers for JDK types that
 * require special handling for some reason.
 */
public class JdkDeserializers
{
    private final static HashSet<String> _classNames = new HashSet<String>();
    static {
        // note: can skip primitive types; other ways to check them:
        Class<?>[] types = new Class<?>[] {
                UUID.class,
                AtomicBoolean.class,
                AtomicInteger.class,
                AtomicLong.class,
                StackTraceElement.class,
                ByteBuffer.class,
                Void.class
        };
        for (Class<?> cls : types) { _classNames.add(cls.getName()); }
        for (Class<?> cls : FromStringDeserializer.types()) { _classNames.add(cls.getName()); }
    }

    /**
     * @deprecated Since 2.14 use the variant that takes one more argument
     */
    @Deprecated // since 2.14
    public static JsonDeserializer<?> find(Class<?> rawType, String clsName)
        throws JsonMappingException
    {
        return find(null, rawType, clsName);
    }

    /**
     * @since 2.14
     */
    public static JsonDeserializer<?> find(DeserializationContext ctxt,
            Class<?> rawType, String clsName)
        throws JsonMappingException
    {
        if (_classNames.contains(clsName)) {
            JsonDeserializer<?> d = FromStringDeserializer.findDeserializer(rawType);
            if (d != null) {
                return d;
            }
            if (rawType == UUID.class) {
                return new UUIDDeserializer();
            }
            if (rawType == StackTraceElement.class) {
                return StackTraceElementDeserializer.construct(ctxt);
            }
            if (rawType == AtomicBoolean.class) {
                return new AtomicBooleanDeserializer();
            }
            if (rawType == AtomicInteger.class) {
                return new AtomicIntegerDeserializer();
            }
            if (rawType == AtomicLong.class) {
                return new AtomicLongDeserializer();
            }
            if (rawType == ByteBuffer.class) {
                return new ByteBufferDeserializer();
            }
            if (rawType == Void.class) {
                return NullifyingDeserializer.instance;
            }
        }
        return null;
    }

    // @since 2.11
    public static boolean hasDeserializerFor(Class<?> rawType) {
        return _classNames.contains(rawType.getName());
    }
}

⏎ com/fasterxml/jackson/databind/deser/std/JdkDeserializers.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