Source Code for Apache Log4j Core Implementation

Apache Log4j Core Implementation provides the functional components of the logging system. Users are free to create their own plugins and include them in the logging configuration. Apache Log4j Core is a required module to use Apache Log4j.

Bytecode (Java 8) for Apache Log4j Core Implementation is provided in a separate JAR file like log4j-core-2.14.1.jar.

Source Code files for Apache Log4j API are provided in both binary packge like and source package like You can download them at Apache Log4j Website.

You can also browse Source Code files for Apache Log4j Core Implementation 2.14.1 below.



 * 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
 * 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.

import java.util.Arrays;

 * Simple PasswordProvider implementation that keeps the password char[] array in memory.
 * <p>
 * This implementation is not very secure because the password data is resident in memory during the life of this
 * provider object, giving attackers a large window of opportunity to obtain the password from a memory dump.
 * A slightly more secure implementation is {@link EnvironmentPasswordProvider},
 * and an even more secure implementation is {@link FilePasswordProvider}.
 * </p>
class MemoryPasswordProvider implements PasswordProvider {
    private final char[] password;

    public MemoryPasswordProvider(final char[] chars) {
        if (chars != null) {
            password = chars.clone();
        } else {
            password = null;

    public char[] getPassword() {
        if (password == null) {
            return null;
        return password.clone();

    public void clearSecrets() {
        Arrays.fill(password, '\0');



Or download all of them as a single archive file:

File name: log4j-core-2.14.1-sources.jar
File size: 1281358 bytes
Release date: 2021-03-06


Source Code for Apache Log4j JDK Logging Adapter

Source Code for Apache Log4j API

Downloading and Reviewing Apache Log4j Packages

⇑⇑ FAQ for Apache Log4j

2015-11-03, 92787👍, 0💬