2 * Copyright (C) 2001, 2002 The Mir-coders group
4 * This file is part of Mir.
6 * Mir is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Mir is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Mir; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * In addition, as a special exception, The Mir-coders gives permission to link
21 * the code of this program with any library licensed under the Apache Software License,
22 * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
23 * (or with modified versions of the above that use the same license as the above),
24 * and distribute linked combinations including the two. You must obey the
25 * GNU General Public License in all respects for all of the code used other than
26 * the above mentioned libraries. If you modify this file, you may extend this
27 * exception to your version of the file, but you are not obligated to do so.
28 * If you do not wish to do so, delete this exception statement from your version.
32 import java.text.NumberFormat;
35 * Help methods for number handling.
37 * @version $Id: NumberUtils.java,v 1.5.2.1 2005/12/23 21:56:27 zapata Exp $
38 * @author mh, Mir-coders group
42 public final class NumberUtils {
43 private NumberUtils() {
47 * Uses a suffix indicating multiples of 1024 (K),
48 * 1024*1024 (M), and 1024*1024*1024 (G). For example,
49 * 8500 would be converted to 8.3K, 133456345 to
50 * 127M, 56990456345 to 53G, and so on. Numbers
51 * smaller than 1024 aren't modified.
53 * @param bytes The number of bytes.
54 * @return A text representation of the number of bytes,
55 * abbreviated for larger quantities.
57 public static String humanReadableSize(double aBytes) {
58 double bytes = aBytes;
61 if ( bytes >= (double) (1024 * 1024 * 1024) ) {
62 bytes /= (double) (1024 * 1024 * 1024);
65 else if( bytes >= (double) (1024 * 1024) ) {
66 bytes /= (double) (1024 * 1024);
69 else if( bytes >= 1024.0 ) {
76 int frac = bytes > 9.5 || bytes < 0.05 ? 0 : 1;
78 NumberFormat nf = NumberFormat.getInstance();
79 nf.setMinimumFractionDigits(frac);
80 nf.setMaximumFractionDigits(frac);
81 nf.setGroupingUsed(false);
83 return nf.format(bytes) + suffix;