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 the com.oreilly.servlet library, any library
22 * licensed under the Apache Software License, The Sun (tm) Java Advanced
23 * Imaging library (JAI), The Sun JIMI library (or with modified versions of
24 * the above that use the same license as the above), and distribute linked
25 * combinations including the two. You must obey the GNU General Public
26 * License in all respects for all of the code used other than the above
27 * mentioned libraries. If you modify this file, you may extend this exception
28 * to your version of the file, but you are not obligated to do so. If you do
29 * not wish to do so, delete this exception statement from your version.
34 import java.text.NumberFormat;
37 * Help methods for number handling.
39 * @version $Id: NumberUtils.java,v 1.4 2003/01/25 17:45:18 idfx Exp $
40 * @author mh, Mir-coders group
44 public final class 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 bytes)
61 if( bytes >= 1024 * 1024 * 1024 )
63 bytes /= (1024 * 1024 * 1024);
66 else if( bytes >= 1024 * 1024 )
68 bytes /= (1024 * 1024);
71 else if( bytes >= 1024 )
80 int frac = (bytes >= 10 || bytes == 0) ? 0 : 1;
81 NumberFormat nf = NumberFormat.getInstance();
82 nf.setMinimumFractionDigits(frac);
83 nf.setMaximumFractionDigits(frac);
84 nf.setGroupingUsed(false);
85 return nf.format(bytes) + suffix;