Here you can find the source of getReadableByteSize(long size)
public static String getReadableByteSize(long size)
//package com.java2s; //License from project: Open Source License import java.text.DecimalFormat; public class Main { public static String getReadableByteSize(long size) { if (size <= 0) { return "0"; }/* w w w .jav a 2s. co m*/ final String[] units = new String[] { "B", "KB", "MB", "GB", "TB", "PB", "EB" }; int digitGroups = (int) (Math.log10(size) / Math.log10(1024)); return new DecimalFormat("#,##0.#").format(size / Math.pow(1024, digitGroups)) + " " + units[digitGroups]; } }