Java tutorial
//package com.java2s; /* * This file is part of Butter. * * Butter is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Butter 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Butter. If not, see <http://www.gnu.org/licenses/>. */ public class Main { /** * Format size in string form * * @param size Size in bytes * @return Size in stinrg format with suffix */ public static String formatSize(int size) { String suffix = null; if (size >= 1024) { suffix = "KB"; size /= 1024; if (size >= 1024) { suffix = "MB"; size /= 1024; } } StringBuilder resultBuffer = new StringBuilder(Long.toString(size)); int commaOffset = resultBuffer.length() - 3; while (commaOffset > 0) { resultBuffer.insert(commaOffset, ','); commaOffset -= 3; } if (suffix != null) resultBuffer.append(suffix); return resultBuffer.toString(); } }