Here you can find the source of stringifyFileSize(double value)
public static String stringifyFileSize(double value)
//package com.java2s; /*//from w w w. ja va 2 s . c o m * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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. */ import java.text.DecimalFormat; public class Main { private static final double KB = 1024d; private static final double MB = 1024 * 1024d; private static final double GB = 1024 * 1024 * 1024d; private static final double TB = 1024 * 1024 * 1024 * 1024d; private static final DecimalFormat df = new DecimalFormat("#.##"); public static String stringifyFileSize(double value) { double d; if (value >= TB) { d = value / TB; String val = df.format(d); return val + " TB"; } else if (value >= GB) { d = value / GB; String val = df.format(d); return val + " GB"; } else if (value >= MB) { d = value / MB; String val = df.format(d); return val + " MB"; } else if (value >= KB) { d = value / KB; String val = df.format(d); return val + " KB"; } else { String val = df.format(value); return val + " bytes"; } } }