Java tutorial
//package com.java2s; /** * ownCloud Android client application * * @author Bartek Przybylski * @author David A. Velasco * Copyright (C) 2011 Bartek Przybylski * Copyright (C) 2015 ownCloud Inc. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2, * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * */ public class Main { private static String getExtension(String filename) { String extension = filename.substring(filename.lastIndexOf(".") + 1).toLowerCase(); return extension; } }