Java File Path Delete deleteDir(File dir)

Description

Recursively deletes the specified directory.

License

Open Source License

Exception

Parameter	Description
IllegalArgumentException	if the specified file is not a directory
IOException	if the directory could not be deleted

Declaration

public static void deleteDir(File dir) throws IOException 

Method Source Code

//package com.java2s;
/*/*w w w  .jav  a2s.  c  o m*/
 * The MIT License (MIT)
 * 
 * Copyright (c) 2010 Technische Universitaet Berlin
 * 
 * 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.IOException;

import java.io.FileFilter;
import java.util.List;
import java.util.ArrayList;

public class Main {
    /**
     * Recursively deletes the specified directory.
     *
     * @throws IllegalArgumentException if the specified file is not a directory
     * @throws IOException if the directory could not be deleted
     */

    public static void deleteDir(File dir) throws IOException {
        if (!dir.exists())
            return;
        if (!dir.isDirectory())
            throw new IllegalArgumentException("Not a directory: " + dir);
        for (File file : dir.listFiles()) {
            if (file.isDirectory())
                deleteDir(file);
            else
                deleteFile(file);
        }
        deleteFile(dir);
    }

    /**
     * Returns all files in the specified directory accepted by the specified filter. If
     * <code>recursive</code> is true, subdirectories are processed recursivly; i.e., files in
     * descendant directories are returned, too.
     */

    public static File[] listFiles(File dir, FileFilter filter, boolean recursive) {
        List<File> files = new ArrayList<File>();
        scanFiles(dir, filter, recursive, files);
        return files.toArray(new File[files.size()]);
    }

    /**
     * Deletes the specified file. Unlike {@link File#delete delete} in class
     * {@link File File}, this method throws an exception if the deletion failed instead of
     * returning false.
     *
     * @throws IOException if the file could not be deleted
     */

    public static void deleteFile(File file) throws IOException {
        if (!file.delete())
            throw new IOException("Could not delete file: " + file);
    }

    /**
     * Auxiliary method to implement {@link #listFiles listFiles}.
     */

    protected static void scanFiles(File dir, FileFilter filter, boolean recursive, List<File> files) {
        if (!dir.isDirectory())
            throw new IllegalArgumentException("scanFiles: not a directory: " + dir);
        for (File file : dir.listFiles()) {
            if (filter == null || filter.accept(file))
                files.add(file);
            if (recursive && file.isDirectory())
                scanFiles(file, filter, recursive, files);
        }
    }
}

Related

1. deleteDir(File dir)
2. deleteDir(File dir)
3. deleteDir(File dir)
4. deleteDir(File dir)
5. deleteDir(File dir)
6. deleteDir(File dir)
7. deleteDir(File dir)
8. deleteDir(File dir)
9. deleteDir(File dir)