Here you can find the source of toHuman(long amount)
public static String toHuman(long amount)
//package com.java2s; /**//w w w .ja v a2 s .c o m * File: $HeadURL: https://hdt-java.googlecode.com/svn/trunk/hdt-java/src/org/rdfhdt/hdt/util/StringUtil.java $ * Revision: $Rev: 191 $ * Last modified: $Date: 2013-03-03 11:41:43 +0000 (dom, 03 mar 2013) $ * Last modified by: $Author: mario.arias $ * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * * Contacting the authors: * Mario Arias: mario.arias@deri.org * Javier D. Fernandez: jfergar@infor.uva.es * Miguel A. Martinez-Prieto: migumar2@infor.uva.es * Alejandro Andres: fuzzy.alej@gmail.com */ public class Main { public static String toHuman(long amount) { return humanReadableByteCount(amount, true); } public static String humanReadableByteCount(long bytes, boolean si) { int unit = si ? 1000 : 1024; if (bytes < unit) return Long.toString(bytes); int exp = (int) (Math.log(bytes) / Math.log(unit)); char pre = "KMGTPE".charAt(exp - 1); return String.format("%.1f%c", bytes / Math.pow(unit, exp), pre); } }