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Java > Open Source Codes > de > laures > cewolf > taglib > util > ColorHelper


1 /* ================================================================
2  * Cewolf : Chart enabling Web Objects Framework
3  * ================================================================
4  *
5  * Project Info: http://cewolf.sourceforge.net
6  * Project Lead: Guido Laures (guido@laures.de);
7  *
8  * (C) Copyright 2002, by Guido Laures
9  *
10  * This library is free software; you can redistribute it and/or modify it under the terms
11  * of the GNU Lesser General Public License as published by the Free Software Foundation;
12  * either version 2.1 of the License, or (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
15  * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16  * See the GNU Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public License along with this
19  * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20  * Boston, MA 02111-1307, USA.
21  */
22
23 package de.laures.cewolf.taglib.util;
24
25 import java.awt.Color JavaDoc;
26
27
28 /** @author Guido Laures */
29 public class ColorHelper {
30
31     private ColorHelper() {
32     }
33
34     public static final Color JavaDoc getColor(String JavaDoc hexString) {
35         try {
36              if (hexString == null || hexString.length() < 7) {
37                 return Color.black;
38             }
39             final int red = Integer.parseInt(hexString.substring(1, 3), 16);
40             final int green = Integer.parseInt(hexString.substring(3, 5), 16);
41             final int blue = Integer.parseInt(hexString.substring(5, 7), 16);
42             int alpha = 0;
43             if (hexString.length() > 8) {
44                 alpha = Integer.parseInt(hexString.substring(7, 9), 16);
45             }
46             if (alpha > 0) {
47                 return new Color JavaDoc(red, green, blue, alpha);
48             } else {
49                 return new Color JavaDoc(red, green, blue);
50             }
51         } catch (NumberFormatException JavaDoc nfe) {
52             return Color.black;
53         }
54     }
55
56 }
57
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