Here you can find the source of formatBytes(long number)
public static String formatBytes(long number)
//package com.java2s; /*//w w w .ja va2s .c om * Copyright 2006 The National Library of New Zealand * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ public class Main { private static final String[] sizePostfix = new String[] { " Bytes", " KBytes", " MBytes", " GBytes" }; public static String formatBytes(long number) { float div = 1024; float start = number; int pfix = 0; while (start > div) { start = start / div; pfix++; } // round to 1 dec place... start = ((long) (start * 10)) / 10f; return start + sizePostfix[pfix]; } }