io.jar is a component in iText Java library to provide input/output functionalities. iText Java library allows you to generate and manage PDF documents.

The Source Code files are provided together with the JAR file in the binary packge like iText7-Core-7.1.4.zip. You can download it at iText 7 Core Download site.

You can compile it to generate your JAR file, using io.pom as the build configuration file.

The source code of io-7.1.4.jar is provided below:

⏎ com/itextpdf/io/codec/brotli/dec/RunningState.java

/* Copyright 2015 Google Inc. All Rights Reserved.

   Distributed under MIT license.
   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/

package com.itextpdf.io.codec.brotli.dec;

/**
 * Enumeration of decoding state-machine.
 */
final class RunningState {
    static final int UNINITIALIZED = 0;
    static final int BLOCK_START = 1;
    static final int COMPRESSED_BLOCK_START = 2;
    static final int MAIN_LOOP = 3;
    static final int READ_METADATA = 4;
    static final int COPY_UNCOMPRESSED = 5;
    static final int INSERT_LOOP = 6;
    static final int COPY_LOOP = 7;
    static final int COPY_WRAP_BUFFER = 8;
    static final int TRANSFORM = 9;
    static final int FINISHED = 10;
    static final int CLOSED = 11;
    static final int WRITE = 12;
}

⏎ com/itextpdf/io/codec/brotli/dec/RunningState.java

Or download all of them as a single archive file:

File name: io-7.1.4-sources.jar
File size: 608762 bytes
Release date: 2018-10-09
Download 

⇒ iText layout.jar Source Code

⇐ iText kernel.jar Source Code

⇑ Download and Install iText Java Library

⇑⇑ iText for PDF Generation