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Java > Open Source Codes > nu > xom > samples > ValidFibonacci


1 /* Copyright 2002, 2003 Elliotte Rusty Harold
2    
3    This library is free software; you can redistribute it and/or modify
4    it under the terms of version 2.1 of the GNU Lesser General Public
5    License as published by the Free Software Foundation.
6    
7    This library is distributed in the hope that it will be useful,
8    but WITHOUT ANY WARRANTY; without even the implied warranty of
9    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10    GNU Lesser General Public License for more details.
11    
12    You should have received a copy of the GNU Lesser General Public
13    License along with this library; if not, write to the
14    Free Software Foundation, Inc., 59 Temple Place, Suite 330,
15    Boston, MA 02111-1307 USA
16    
17    You can contact Elliotte Rusty Harold by sending e-mail to
18    elharo@metalab.unc.edu. Please include the word "XOM" in the
19    subject line. The XOM home page is located at http://www.xom.nu/
20 */
21
22 package nu.xom.samples;
23
24 import java.math.BigInteger JavaDoc;
25
26 import nu.xom.Attribute;
27 import nu.xom.DocType;
28 import nu.xom.Document;
29 import nu.xom.Element;
30
31 /**
32  * <p>
33  * Demonstrates the creation and serialization
34  * of a simple XML document that includes a
35  * document type declaration.
36  * </p>
37  *
38  * @author Elliotte Rusty Harold
39  * @version 1.0
40  *
41  */
42 public class ValidFibonacci {
43
44   public static void main(String JavaDoc[] args) {
45    
46       BigInteger JavaDoc low = BigInteger.ONE;
47       BigInteger JavaDoc high = BigInteger.ONE;
48       
49       Element root = new Element("Fibonacci_Numbers");
50       for (int i = 1; i <= 10; i++) {
51         Element fibonacci = new Element("fibonacci");
52         fibonacci.appendChild(low.toString());
53         Attribute index = new Attribute("index", String.valueOf(i));
54         fibonacci.addAttribute(index);
55         root.appendChild(fibonacci);
56         
57         BigInteger JavaDoc temp = high;
58         high = high.add(low);
59         low = temp;
60       }
61       Document doc = new Document(root);
62       DocType doctype
63         = new DocType("Fibonacci_Numbers", "fibonacci.dtd");
64       doc.insertChild(doctype, 0);
65       System.out.println(doc.toXML());
66
67   }
68
69 }
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