Java File Size Readable Format toHuman(Double n)

Description

prints large numbers as KB, MB, GB or TB

License

Apache License

Parameter

Parameter	Description
n	the number to convert as string

Return

string representation of the number

Declaration

static public String toHuman(Double n) 

Method Source Code

//package com.java2s;
/*/*from w  w w.j a  v a2  s  .  c om*/
 * Copyright 2015 Lutz Fischer <lfischer at staffmail.ed.ac.uk>.
 *
 * 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.
 */

public class Main {
    /**
     * prints large numbers as KB, MB, GB or TB 
     * @param n the number to convert as string
     * @return string representation of the number
     */
    static public String toHuman(Double n) {
        if (n == null)
            return null;
        String u = "B";
        if (n > 1024) {
            n /= 1024;
            u = "KB";
        }
        if (n > 1024) {
            n /= 1024;
            u = "MB";
        }
        if (n > 1024) {
            n /= 1024;
            u = "GB";
        }
        if (n > 1024) {
            n /= 1024;
            u = "TB";
        }

        if (n > 10)
            return String.format("%.0f" + u, n);

        if (Math.abs(Math.round(n) - n) >= 0.1) {
            return String.format("%.1f" + u, n);
        }

        return String.format("%.0f" + u, n);
    }
}

Related

1. getHumanSize(File dir)
2. getReadableFileSize(int size)
3. getReadableFileSize(long fileSizeInBytes)
4. getReadableFileSize(long size)
5. getReadableFileSize(long size, boolean abbreviation)
6. toHumanReadableByteCount(final long bytes)
7. toHumanReadableFileSize(long fileSize)
8. toHumanReadableSize(final long bytes)