Java tutorial
//package com.java2s; /* This file is part of Subsonic. Subsonic is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Subsonic 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 Subsonic. If not, see <http://www.gnu.org/licenses/>. Copyright 2009 (C) Sindre Mehus */ import java.io.File; import java.util.Arrays; import java.util.List; public class Main { private static final List<String> MUSIC_FILE_EXTENSIONS = Arrays.asList("mp3", "ogg", "aac", "flac", "m4a", "wav", "wma"); private static boolean isMusicFile(File file) { String extension = getExtension(file.getName()); return MUSIC_FILE_EXTENSIONS.contains(extension); } /** * Returns the extension (the substring after the last dot) of the given file. The dot * is not included in the returned extension. * * @param name The filename in question. * @return The extension, or an empty string if no extension is found. */ public static String getExtension(String name) { int index = name.lastIndexOf('.'); return index == -1 ? "" : name.substring(index + 1).toLowerCase(); } }