Apache Log4j provides the interface that applications should code to and provides the adapter components required for implementers to create a logging implementation.

Bytecode (Java 1.4) for Apache Log4j is provided in a JAR file like log4j-1.2.17.jar.

Source Code files for Apache Log4j are provided in both binary packge like log4j-1.2.17.zip and source package like log4j-1.2.17-sources.zip. You can download them at Apache Log4j Website.

You can also browse Source Code files for Apache Log4j 1.2.17 below.

⏎ org/apache/log4j/BasicConfigurator.java

/*
 * 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,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Contibutors: "Luke Blanshard" <Luke@quiq.com>
//              "Mark DONSZELMANN" <Mark.Donszelmann@cern.ch>
//              "Muly Oved" <mulyoved@hotmail.com>

package org.apache.log4j;


/**
   Use this class to quickly configure the package.

   <p>For file based configuration see {@link
   PropertyConfigurator}. For XML based configuration see {@link
   org.apache.log4j.xml.DOMConfigurator DOMConfigurator}.

   @since 0.8.1
   @author Ceki G&uuml;lc&uuml; */
public class BasicConfigurator {

  protected BasicConfigurator() {
  }

  /**
     Add a {@link ConsoleAppender} that uses {@link PatternLayout}
     using the {@link PatternLayout#TTCC_CONVERSION_PATTERN} and
     prints to <code>System.out</code> to the root category.  */
  static
  public
  void configure() {
    Logger root = Logger.getRootLogger();
    root.addAppender(new ConsoleAppender(
           new PatternLayout(PatternLayout.TTCC_CONVERSION_PATTERN)));
  }

  /**
     Add <code>appender</code> to the root category.
     @param appender The appender to add to the root category.
  */
  static
  public
  void configure(Appender appender) {
    Logger root = Logger.getRootLogger();
    root.addAppender(appender);
  }

  /**
     Reset the default hierarchy to its defaut. It is equivalent to
     calling
     <code>Category.getDefaultHierarchy().resetConfiguration()</code>.

     See {@link Hierarchy#resetConfiguration()} for more details.  */
  public
  static
  void resetConfiguration() {
    LogManager.resetConfiguration();
  }
}

⏎ org/apache/log4j/BasicConfigurator.java

Or download all of them as a single archive file:

File name: log4j-1.2.17-sources.jar
File size: 481200 bytes
Release date: 2012-05-06
Download 

⇒ Download and Install apache-log4j-1.2.15.zip

⇐ Download and Install log4j-1.2.17.zip

⇑ Downloading Apache Log4j 1.x JAR Packages

⇑⇑ FAQ for Apache Log4j