Here you can find the source of getFiles(File dir, final String extension)
public static Map<String, File> getFiles(File dir, final String extension)
//package com.java2s; /*/* w w w . j a v a 2s .co m*/ * The MIT License (MIT) * * Copyright (c) 2016 Rojoss <http://jroossien.com> * Copyright (c) 2016 contributors * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ import java.io.File; import java.io.FilenameFilter; import java.util.*; public class Main { public static Map<String, File> getFiles(File dir, final String extension) { Map<String, File> names = new HashMap<String, File>(); if (dir == null || !dir.exists() || !dir.isDirectory()) { return names; } File[] files = dir.listFiles(new FilenameFilter() { public boolean accept(File dir, String name) { return name.toLowerCase().endsWith("." + extension); } }); for (File file : files) { names.put(file.getName().substring(0, file.getName().length() - extension.length() - 1), file); } return names; } }