Apache Commons Codec Source Code

Apache Commons Codec library provides implementations of common encoders and decoders such as Base64, Hex, Phonetic and URLs.

Apache Commons Codec Source Code files are provided in both binary packge (commons-codec-3.15-bin.zip) and source package (commons-codec-3.15-src.zip). You can download them at Apache Commons Codec Website.

Apache Commons Codec Source Code has no dependencies. You can compile it to generate your own version of Apache Commons Codec JAR file.

The source code of Apache Commons Codec 1.15 is provided below:

✍: FYIcenter


 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *      http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package org.apache.commons.codec;

import java.util.Comparator;

 * Compares Strings using a {@link StringEncoder}. This comparator is used to sort Strings by an encoding scheme such as
 * Soundex, Metaphone, etc. This class can come in handy if one need to sort Strings by an encoded form of a name such
 * as Soundex.
 * <p>This class is immutable and thread-safe.</p>
// TODO ought to implement Comparator<String> but that's not possible whilst maintaining binary compatibility.
public class StringEncoderComparator implements Comparator {

     * Internal encoder instance.
    private final StringEncoder stringEncoder;

     * Constructs a new instance.
     * @deprecated Creating an instance without a {@link StringEncoder} leads to a {@link NullPointerException}. Will be
     *             removed in 2.0.
    public StringEncoderComparator() {
        this.stringEncoder = null; // Trying to use this will cause things to break

     * Constructs a new instance with the given algorithm.
     * @param stringEncoder
     *            the StringEncoder used for comparisons.
    public StringEncoderComparator(final StringEncoder stringEncoder) {
        this.stringEncoder = stringEncoder;

     * Compares two strings based not on the strings themselves, but on an encoding of the two strings using the
     * StringEncoder this Comparator was created with.
     * If an {@link EncoderException} is encountered, return {@code 0}.
     * @param o1
     *            the object to compare
     * @param o2
     *            the object to compare to
     * @return the Comparable.compareTo() return code or 0 if an encoding error was caught.
     * @see Comparable
    public int compare(final Object o1, final Object o2) {

        int compareCode = 0;

        try {
            @SuppressWarnings("unchecked") // May fail with CCE if encode returns something that is not Comparable
            // However this was always the case.
            final Comparable<Comparable<?>> s1 = (Comparable<Comparable<?>>) this.stringEncoder.encode(o1);
            final Comparable<?> s2 = (Comparable<?>) this.stringEncoder.encode(o2);
            compareCode = s1.compareTo(s2);
        } catch (final EncoderException ee) {
            compareCode = 0;
        return compareCode;




Or download all of them as a single archive file:

File name: commons-codec-1.15-sources.jar
File size: 364441 bytes
Release date: 2020-09-01


Download and Install commons-codec-1.15-bin.zip

What Is commons-codec.jar

Downloading and Reviewing commons-codec.jar

⇑⇑ FAQ for Apache Commons Codec JAR Library

2020-06-28, 105721👍, 1💬