Java Size Format formatDataSize(final double dataSize)

Description

Formats the specified data size in human readable format.

License

Apache License

Parameter

Parameter	Description
dataSize	Data size in bytes

Return

Human readable format

Declaration

public static String formatDataSize(final double dataSize) 

Method Source Code

//package com.java2s;
/**/* w w w  .j a va 2s .  c  om*/
 * Copyright (C) 2016 Hurence (support@hurence.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.text.NumberFormat;

public class Main {
    private static final double BYTES_IN_KILOBYTE = 1024;
    private static final double BYTES_IN_MEGABYTE = BYTES_IN_KILOBYTE * 1024;
    private static final double BYTES_IN_GIGABYTE = BYTES_IN_MEGABYTE * 1024;
    private static final double BYTES_IN_TERABYTE = BYTES_IN_GIGABYTE * 1024;

    /**
     * Formats the specified data size in human readable format.
     *
     * @param dataSize Data size in bytes
     * @return Human readable format
     */
    public static String formatDataSize(final double dataSize) {
        // initialize the formatter
        final NumberFormat format = NumberFormat.getNumberInstance();
        format.setMaximumFractionDigits(2);

        // check terabytes
        double dataSizeToFormat = dataSize / BYTES_IN_TERABYTE;
        if (dataSizeToFormat > 1) {
            return format.format(dataSizeToFormat) + " TB";
        }

        // check gigabytes
        dataSizeToFormat = dataSize / BYTES_IN_GIGABYTE;
        if (dataSizeToFormat > 1) {
            return format.format(dataSizeToFormat) + " GB";
        }

        // check megabytes
        dataSizeToFormat = dataSize / BYTES_IN_MEGABYTE;
        if (dataSizeToFormat > 1) {
            return format.format(dataSizeToFormat) + " MB";
        }

        // check kilobytes
        dataSizeToFormat = dataSize / BYTES_IN_KILOBYTE;
        if (dataSizeToFormat > 1) {
            return format.format(dataSizeToFormat) + " KB";
        }

        // default to bytes
        return format.format(dataSize) + " bytes";
    }
}

Related

1. format(long size)
2. formatBinarySize(final long l)
3. formatBytes(double size)
4. formatBytes(long size)
5. formatByteSize(long bytes)
6. formatDataSize(long bytes)
7. formatDecimal(double size)
8. formatDiskSize(final long diskSize)
9. formatFileSize(double fileSize, int precision, int unit, boolean showUnit)