Manager - File Size

public String getFileSizes(long size) {

if(size <= 0) return "0";
final String[] units = new String[] { "B", "KB", "MB", "GB", "TB", "PB", "EB" };
int digitGroups = (int) (Math.log10(size)/Math.log10(1024));
String result = null;
result = new DecimalFormat("#,##0.#").format(size/Math.pow(1024, digitGroups)) + " " + units[digitGroups];
return result;
}

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