Here you can find the source of bytesToString(long bytes)
public static String bytesToString(long bytes)
//package com.java2s; //License from project: Open Source License public class Main { public static String bytesToString(long bytes) { int unit = 1024; if (bytes < unit) return bytes + " B"; int exp = (int) (Math.log(bytes) / Math.log(unit)); String pre = ("KMGTPE").charAt(exp - 1) + ""; return String.format("%.1f %sB", bytes / Math.pow(unit, exp), pre); }/* w ww .j av a2s . c om*/ }