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

intformatSize(Integer size)
format Size 
return formatPositiveInt(size, 10);
StringformatSize(long bytes)
format Size 
long factor = 1;
int pos = 0;
String[] abrv = { "B", "KB", "MB", "GB" };
for (int i = 0; i < 4; i++) {
    if (bytes / factor == 0) {
        pos = i - 1;
        break;
    factor *= 1024;
return "" + ((bytes * 1024) / factor) + " " + abrv[pos];
StringformatSize(long bytes, String b, String kb, String mb, String gb)
format Size 
if (bytes > 16L * G)
    return (bytes / G) + gb;
else if (bytes > 16L * M)
    return (bytes / M) + mb;
else if (bytes > 16L * K)
    return (bytes / K) + kb;
else
    return bytes + b;
...
StringformatSize(long size)
Change byte to KB/MB/GB...(Accurate to two decimal places) 
if (size <= 0) {
    return "0B";
String[] units = new String[] { "B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB", "NB", "DB", "CB", };
int i = 0;
float newSize = size;
while (newSize >= 1024) {
    newSize /= 1024;
...
StringformatSize(long size)
Returns a human-readable version of the file size. 
String display;
if (size / ONE_G > 0) {
    display = String.format("%.2f", (size + 0.0) / ONE_G) + " G";
} else if (size / ONE_M > 0) {
    display = String.format("%.2f", (size + 0.0) / ONE_M) + " M";
} else if (size / ONE_K > 0) {
    display = String.format("%.2f", (size + 0.0) / ONE_K) + " K";
} else {
...
StringformatSize(long size)
format Size 
if (size < GIGA)
    return ((float) size / MEGA) + "MB";
else
    return ((float) size / GIGA) + "GB";
StringformatSize(long size)
Takes a size of a file or heap of memory in the form of a long and returns a formatted readable version in the form of byte units. 
if (size < 1024) {
    return size + " B";
int exp = (int) (Math.log(size) / Math.log(1024));
return String.format("%.1f %sB", size / Math.pow(1024, exp), "KMGTPE".charAt(exp - 1));
StringformatSize(long size)
format Size 
String result = "";
if (size >= 0 && size < KB) {
    result = size + "B";
} else if (size >= KB && size < MB) {
    result = size / KB + "KB";
} else if (size >= MB && size < GB) {
    result = size / MB + "MB";
} else if (size >= GB) {
...
StringformatSize(long size)
format Size 
if (size < 1024)
    return String.format("%d B", size);
else if (size < 1024 * 1024)
    return String.format("%.2f KB", (double) size / 1024);
else if (size < 1024 * 1024 * 1024)
    return String.format("%.2f MB", (double) size / (1024 * 1024));
else if (size < 1024L * 1024 * 1024 * 1024)
    return String.format("%.2f GB", (double) size / (1024 * 1024 * 1024));
...
StringformatSize(long size)
format Size 
if (size >= 100 * ONE_GIGABYTE)
    return String.format("%,d GB", size / ONE_GIGABYTE);
if (size >= 10 * ONE_GIGABYTE)
    return String.format("%.1f GB", (double) size / ONE_GIGABYTE);
if (size >= ONE_GIGABYTE)
    return String.format("%.2f GB", (double) size / ONE_GIGABYTE);
if (size >= 10 * ONE_MEGABYTE)
    return String.format("%,d MB", size / ONE_MEGABYTE);
...