Java Utililty Methods File Size Readable Format

List of utility methods to do File Size Readable Format

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Description

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

Method

StringconvertFileSize(double size, Locale locale)
convert File Size 
String strSize;
long kb = 1024;
long mb = 1024 * kb;
long gb = 1024 * mb;
long tb = 1024 * gb;
NumberFormat formatter = NumberFormat.getNumberInstance(locale);
formatter.setMaximumFractionDigits(2);
formatter.setMinimumFractionDigits(2);
...
StringconvertFileSize(long size)
convert File Size 
long kb = 1024;
long mb = kb * 1024;
long gb = mb * 1024;
DecimalFormat df = new DecimalFormat("#.00");
if (size >= gb) {
    return df.format((double) size / gb) + "GB";
} else if (size >= mb) {
    return df.format((double) size / mb) + "MB";
...
StringconvertFileSize(long size)
convert File Size 
String unit = "B";
if (size >= 1024) {
    size = size / 1024;
    unit = "KB";
if (size >= 1024) {
    size = size / 1024;
    unit = "MB";
...
StringformatarNumeroComZerosAEsquerda(long numero, int size)
formatar Numero Com Zeros A Esquerda 
String result = String.valueOf(numero);
while (result.length() < size) {
    result = "0" + result;
return result;
StringformatByteSize(long bytes, int decimals)
format Byte Size 
decimals = Math.min(Math.max(decimals, 0), 4);
if (bytes < 1024)
    return bytes + "B";
int exp = (int) (Math.log(bytes) / Math.log(1024));
String pre = "KMGTPE".charAt(exp - 1) + "";
return String.format("%." + decimals + "f%s", bytes / Math.pow(1024, exp), pre);
StringformatByteSize(long bytes, int lastDigits)
This methode formats the bytes in human readable form. 
String formated = null;
double work = bytes;
long count = 0;
while (work >= 1024) {
    work /= 1024;
    count++;
formated = String.valueOf(work);
...
StringformatByteSize(long byteSize)
format Byte Size 
float size = (float) byteSize;
String metrics = " b";
if (size >= 1024) {
    size = size / 1024;
    metrics = " Kb";
if (size >= 1024) {
    size = size / 1024;
...
StringformatByteSizeToString(long bytes)
Present a size (in bytes) as a human-readable value 
int total = sizes.length - 1;
double value = bytes;
for (; value > 1024; total--) {
    value /= 1024;
value = (double) ((int) (value * 10)) / 10;
return value + " " + sizes[total];
StringformatDataSize(long size)
Formats the data size in B, KB, MB or GB, TB as needed 
double dsize = size;
String retval = "";
if (dsize < 1024.0) {
    retval = size + " B";
    return retval;
if (dsize < 1024.0 * 1024.0) {
    double val = Math.round(dsize / 1024.0 * 10.0) / 10.0;
...
StringFormatDataSize(long uBytes)
Format Data Size 
final long uKB = 1024;
final long uMB = uKB * uKB;
final long uGB = uMB * uKB;
final long uTB = uGB * uKB;
if (uBytes == 0)
    return "0 KB";
if (uBytes <= uKB)
    return "1 KB";
...