Java tutorial
//package com.java2s; public class Main { public static String humanSize(Long ds) { String textuse = ""; if (ds < 1024) { textuse = (Long.toString(ds) + "B"); } else if (ds < (1024 * 1024)) { textuse = (Long.toString(ds / 1024) + "K"); } else if (ds < (1024 * 1024 * 1024)) { textuse = (Long.toString(ds / (1024 * 1024)) + "MB"); } else { textuse = (Long.toString(ds / (1024 * 1024 * 1024)) + "GB"); } return textuse; } }