Here you can find the source of getFiles(File dir, FilenameFilter filter)
static List<File> getFiles(File dir, FilenameFilter filter)
//package com.java2s; /**//from w w w .j a va 2s. c om * 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 * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.io.File; import java.io.FilenameFilter; import java.util.ArrayList; import java.util.List; public class Main { static List<File> getFiles(File dir, FilenameFilter filter) { List<File> result = new ArrayList<File>(); getFiles(dir, result, filter); return result; } static void getFiles(File dir, List<File> list, FilenameFilter filter) { if (!list.contains(dir)) { list.add(dir); String[] fileNames = dir.list(filter); for (int i = 0; i < fileNames.length; i++) { File f = new File(dir, fileNames[i]); if (f.isFile()) { list.add(f); } else { getFiles(dir, list, filter); } } } } }