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/util/ByteBufferBackedOutputStream.java

package com.fasterxml.jackson.databind.util;

import java.io.*;
import java.nio.ByteBuffer;

/**
 * Simple {@link OutputStream} implementation that appends content
 * written in given {@link ByteBuffer} instance.
 */
public class ByteBufferBackedOutputStream extends OutputStream {
    protected final ByteBuffer _b;

    public ByteBufferBackedOutputStream(ByteBuffer buf) { _b = buf; }

    @Override public void write(int b) throws IOException { _b.put((byte) b); }
    @Override public void write(byte[] bytes, int off, int len) throws IOException { _b.put(bytes, off, len); }
}

⏎ com/fasterxml/jackson/databind/util/ByteBufferBackedOutputStream.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