Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/**
 *    Copyright (C) 2012 ZeroTurnaround LLC <support@zeroturnaround.com>
 *
 *    Licensed 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.FileFilter;
import java.util.ArrayList;
import java.util.Collection;

public class Main {
    public static Collection<File> listFiles(File dir) {
        return listFiles(dir, null);
    }

    public static Collection<File> listFiles(File dir, FileFilter filter) {
        Collection<File> accumulator = new ArrayList<File>();

        if (dir.isFile()) {
            return accumulator;
        }

        if (filter == null) {
            // Set default filter to accept any file
            filter = new FileFilter() {
                public boolean accept(File pathname) {
                    return true;
                }
            };
        }

        innerListFiles(dir, accumulator, filter);
        return accumulator;
    }

    private static void innerListFiles(File dir, Collection<File> accumulator, FileFilter filter) {

        String[] filenames = dir.list();

        if (filenames != null) {
            for (int i = 0; i < filenames.length; i++) {
                File file = new File(dir, filenames[i]);
                if (file.isDirectory()) {
                    innerListFiles(file, accumulator, filter);
                } else {
                    if (filter != null && filter.accept(file)) {
                        accumulator.add(file);
                    }
                }
            }
        }
    }
}