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

StringFormatDataSizeKB(long uBytes)
Format Data Size KB 
final long uKB = 1024;
if (uBytes == 0)
    return "0 KB";
if (uBytes <= uKB)
    return "1 KB";
return (((uBytes - 1L) / uKB) + 1L) + " KB";
StringformatFileSize(long bytes)
format File Size 
if (bytes < 4096) {
    return bytes + " bytes";
} else if (bytes < 1024 * 1024) {
    return (Math.round(10 * bytes / 1024) / 10) + " kb";
} else {
    return (Math.round(10 * bytes / (1024 * 1024)) / 10) + " mb";
StringformatFileSize(long bytes, boolean si)
format File Size 
int unit = si ? 1000 : 1024;
if (bytes < unit)
    return bytes + " B";
int exp = (int) (Math.log(bytes) / Math.log(unit));
String pre = (si ? "kMGTPE" : "KMGTPE").charAt(exp - 1) + (si ? "" : "i");
return String.format("%.1f %sB", bytes / Math.pow(unit, exp), pre);
StringformatFileSize(long fileSize)
Formats fileSize (in byte) in B/KB/MB/GB 
String unit = "B";
double size = 0;
if (fileSize < 1024) {
    unit = "B";
    size = (double) fileSize;
} else if (fileSize < (1024 * 1024L)) {
    unit = "KB";
    size = (double) fileSize / (1024L);
...
StringformatFileSize(long fileSize)
Formats a file size as a string (Kb). 
long size = fileSize / 1024;
return String.valueOf(size);
StringformatFileSize(long fileSize)
format File Size 
String suffix = null;
if (fileSize < 1024L)
    suffix = "B";
else if (fileSize < 0x100000L) {
    fileSize = Math.round(fileSize / 1024L);
    suffix = "KB";
} else {
    fileSize = Math.round((fileSize / 0x100000L) * 100L) / 100;
...
StringformatFileSize(long fileSizeLong)
format File Size 
double fileSize = fileSizeLong;
if (fileSize < 1024) {
    return String.format("%d bytes", fileSizeLong);
fileSize /= 1024;
if (fileSize < 1024) {
    return String.format("%.2f KB", fileSize);
fileSize /= 1024;
return String.format("%.2f MB", fileSize);
StringformatFileSize(long size)
Formats a file size to a printable string. 
float value = size;
String unit;
if (size > 1000000) {
    value /= 1048576;
    unit = " MiB";
} else if (size > 2000) {
    value /= 1024;
    unit = " KiB";
...
StringformatFileSize(long size)
Formats file size, applying KB, MB, GB units. 
if (size == 0) {
    return "0";
if (size < 1024) {
    return size + "B";
if (size >= 1024 && size < 1048576) {
    return Math.round((size / 1024) * 100.0) / 100.0 + "KB";
...
StringformatFileSize(long size, String format)
1204,K => 1K 
if (format.equals("K")) {
    return size / 1024.0 + "K";
if (format.equals("M")) {
    return size / 1024.0 / 1024.0 + "M";
if (format.equals("G")) {
    return size / 1024.0 / 1024.0 / 1024.0 + "G";
...