Java Utililty Methods Size Format

List of utility methods to do Size Format

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Description

The list of methods to do Size Format are organized into topic(s).

Method

StringformatFileSize(long size)
format File Size 
double bytes = size;
double kBytes = 0.0;
double mBytes = 0.0;
double gBytes = 0.0;
if (bytes >= 1024.0) {
    kBytes = bytes / 1024.0;
    if (kBytes >= 1024.0) {
        mBytes = kBytes / 1024.0;
...
StringformatFileSize(long size)
formatFileSize Convert a int representation into the label of file size. 
StringBuffer str = new StringBuffer();
NumberFormat nf = NumberFormat.getInstance();
nf.setMaximumFractionDigits(1);
nf.setMinimumFractionDigits(1);
if (size <= 0) {
    return "0 bytes";
if (size < 1024) {
...
StringformatFileSize(Long sizeBytes)
format File Size 
String size = "";
try {
    double dSize = (double) sizeBytes;
    if (dSize >= 1024) {
        dSize /= 1024;
        size = "K";
        if (dSize >= 1024) {
            dSize /= 1024;
...
StringformatFilesizeGB(long filesize, int fractionDigits)
Formats filesize in bytes to GB 
numberFormat.setMaximumFractionDigits(fractionDigits);
return new StringBuffer(numberFormat.format(filesize / 1073741824.0)).append(" GB").toString();
StringformatGameSize(int size)
format Game Size 
DecimalFormat df = new DecimalFormat("0.00");
if (size > 1024 * 1024) {
    return String.valueOf(df.format((float) size / (1024 * 1024))) + "M";
} else {
    return String.valueOf(df.format((float) size / 1024)) + "K";
StringformatMemorySize(long size)
format Memory Size 
long sizeInKB;
if (size == 0) {
    sizeInKB = 0;
} else {
    sizeInKB = size / 1024;
    if (size % 1024 != 0) {
        sizeInKB++;
    if (sizeInKB > 10 * 1024) {
        long sizeInMB = size / (1024 * 1024);
        return "" + memoryFormat.format(sizeInMB) + " MB";
return "" + memoryFormat.format(sizeInKB) + " KB";
StringformatPartSize(int size, NumberFormat format)
Format the size of a part like message or attachment. 
String value = null;
if (size >= 1024) {
    value = format.format(size / 1024) + " KB";
} else {
    if (size > 0) {
        value = Integer.toString(size) + " B";
    } else {
        value = "n/a";
...
StringformatSize(double fileSize)
format Size 
DecimalFormat onePlace = new DecimalFormat("0.0");
String result = "";
result = "<h1>" + (int) fileSize + "</h1> bytes";
double length = 0.0;
if (fileSize > 1024) {
    length = fileSize / 1024;
    result = "<h1>" + onePlace.format(length) + "</h1> kilo bytes";
if (fileSize > 1048576) {
    length = fileSize / 1048576;
    result = "<h1>" + onePlace.format(length) + "</h1> mega bytes";
if (fileSize > 1073741824) {
    length = fileSize / 1073741824;
    result = "<h1>" + onePlace.format(length) + "</h1> giga bytes";
return result;
StringformatSize(double size)
Format as a size 
return doubleSizeFormatter.format(size);
StringformatSize(int size)
Formats a file size in bytes into a human readable file size, e.g 10,4 MB etc. 
if (size <= 0)
    return "0";
int digitGroups = (int) (Math.log10(size) / Math.log10(1024));
return new DecimalFormat("#,##0.#").format(size / Math.pow(1024, digitGroups)) + " " + units[digitGroups];