Source Code for Apache Log4j 1.2.17

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 and source package like You can download them at Apache Log4j Website.

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

package org.apache.log4j.pattern;

 * Formats an date by delegating to DatePatternConverter.  The default
 * date pattern for a %d specifier in a file name is different than
 * the %d pattern in pattern layout.
 * @author Curt Arnold
public final class FileDatePatternConverter {
   * Private constructor.
  private FileDatePatternConverter() {

   * Obtains an instance of pattern converter.
   * @param options options, may be null.
   * @return instance of pattern converter.
  public static PatternConverter newInstance(
    final String[] options) {
    if ((options == null) || (options.length == 0)) {
      return DatePatternConverter.newInstance(
        new String[] {

    return DatePatternConverter.newInstance(options);



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