Java File Size Readable Format getHumanSize(File dir)

Description

get Human Size

License

Apache License

Declaration

public static String getHumanSize(File dir) 

Method Source Code

//package com.java2s;
/*/* w  ww  .j  a  v a2 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.text.DecimalFormat;

public class Main {
    public static String getHumanSize(File dir) {
        return getHumanSize(getSize(dir));
    }

    public static String getHumanSize(long size) {
        if (size <= 0)
            return "0";
        final String[] units = new String[] { "B", "KB", "MB", "GB", "TB" };
        int digitGroups = (int) (Math.log10(size) / Math.log10(1024));
        return new DecimalFormat("#,##0.#").format(size
                / Math.pow(1024, digitGroups))
                + " " + units[digitGroups];
    }

    public static long getSize(File dir) {
        long size = 0;
        if (dir.isFile()) {
            size = dir.length();
        } else {
            File[] subFiles = dir.listFiles();

            for (File file : subFiles) {
                if (file.isFile()) {
                    size += file.length();
                } else {
                    size += getSize(file);
                }

            }
        }
        return size;
    }
}

Related

1. formatSpaceUsage(long size)
2. formatToolBarDisplay(String text, int size)
3. getFileSizeInByte(File file)
4. getFileSizeInBytes(File f)
5. getFileSizeInMB(String fileName)
6. getReadableFileSize(int size)
7. getReadableFileSize(long fileSizeInBytes)
8. getReadableFileSize(long size)
9. getReadableFileSize(long size, boolean abbreviation)