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Java > Open Source Codes > com > micronova > util > NumberUtil


1 /*
2
3 Copyright 2003-2007 MicroNova (R)
4 All rights reserved.
5
6 Redistribution and use in source and binary forms, with or
7 without modification, are permitted provided that the following
8 conditions are met:
9
10     * Redistributions of source code must retain the above copyright
11     notice, this list of conditions and the following disclaimer.
12
13     * Redistributions in binary form must reproduce the above copyright
14     notice, this list of conditions and the following disclaimer in the
15     documentation and/or other materials provided with the distribution.
16
17     * Neither the name of MicroNova nor the names of its contributors
18     may be used to endorse or promote products derived from this
19     software without specific prior written permission.
20
21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 POSSIBILITY OF SUCH DAMAGE.
32
33 */
34
35
36 package com.micronova.util;
37
38 /** numeric utilities */
39
40 public class NumberUtil
41 {
42     /** fills string to the left using filler. If filler is "ABCD", then string "X" becomes "ABCX", string "XX" becomes "ABXX", etc. */
43
44     protected static String JavaDoc _fill(String JavaDoc string, String JavaDoc filler)
45     {
46         int fillerLength = filler.length();
47         int stringLength = string.length();
48         
49         if (stringLength < fillerLength)
50         {
51             string = filler.substring(0, fillerLength - stringLength) + string;
52         }
53
54         return string;
55     }
56
57     /** converts a long to binary using filler */
58
59     public static final String JavaDoc toBinaryString(long number, String JavaDoc filler)
60     {
61         String JavaDoc string = Long.toBinaryString(number);
62
63         if (filler != null)
64         {
65             string = _fill(string, filler.toString());
66         }
67         
68         return string;
69     }
70
71     /** converts a long to hex using filler */
72
73     public static final String JavaDoc toHexString(long number, String JavaDoc filler)
74     {
75         String JavaDoc string = Long.toHexString(number);
76
77         if (filler != null)
78         {
79             string = _fill(string, filler.toString());
80         }
81         
82         return string;
83     }
84
85     /** converts a long to octal using filler */
86
87     public static final String JavaDoc toOctalString(long number, String JavaDoc filler)
88     {
89         String JavaDoc string = Long.toOctalString(number);
90
91         if (filler != null)
92         {
93             string = _fill(string, filler.toString());
94         }
95         
96         return string;
97     }
98
99     /** converts binary string to long */
100
101     public static final long fromBinaryString(String JavaDoc string)
102     {
103         return Long.parseLong(string, 2);
104     }
105
106     /** converts hex string to long */
107
108     public static final long fromHexString(String JavaDoc string)
109     {
110         return Long.parseLong(string, 16);
111     }
112
113     /** converts octal string to long */
114
115     public static final long fromOctalString(String JavaDoc string)
116     {
117         return Long.parseLong(string, 8);
118     }
119 }
120
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