Here you can find the source of getFiles(File dir, final String pattern)
public static List<File> getFiles(File dir, final String pattern)
//package com.java2s; /**//ww w. j av a 2 s . com * 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.util.ArrayList; import java.util.List; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static List<File> getFiles(File dir, final String pattern) { return getFiles(dir, pattern, null); } public static List<File> getFiles(File dir, final String pattern, File exclude) { return getFilesRecurse(dir, Pattern.compile(pattern), exclude, false, new ArrayList<File>()); } public static List<File> getFilesRecurse(File dir, final String pattern) { return getFilesRecurse(dir, pattern, null); } public static List<File> getFilesRecurse(File dir, final String pattern, File exclude) { return getFilesRecurse(dir, Pattern.compile(pattern), exclude, true, new ArrayList<File>()); } private static List<File> getFilesRecurse(File dir, Pattern pattern, File exclude, boolean rec, List<File> fileList) { for (File file : dir.listFiles()) { if (file.equals(exclude)) { continue; } if (file.isDirectory() && rec) { getFilesRecurse(file, pattern, exclude, rec, fileList); } else { Matcher m = pattern.matcher(file.getName()); if (m.matches()) { fileList.add(file); } } } return fileList; } }