001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache license, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the license for the specific language governing permissions and 015 * limitations under the license. 016 */ 017 018package org.apache.logging.log4j.core; 019 020public class Version { 021 022 public static void main(final String[] args) { 023 System.out.println(getProductString()); 024 } 025 026 public static String getProductString() { 027 final Package pkg = Version.class.getPackage(); 028 if (pkg == null) { 029 return "Apache Log4j"; 030 } 031 return String.format("%s %s", pkg.getSpecificationTitle(), pkg.getSpecificationVersion()); 032 } 033 034}