Here's the same program using DOM instead of JDOM. Which is simpler?
import java.math.*;
import java.io.*;
import org.w3c.dom.*;
import org.apache.xerces.dom.*;
import org.apache.xml.serialize.*;
public class FibonacciDOM {
public static void main(String[] args) {
try {
DOMImplementation impl = DOMImplementationImpl.getDOMImplementation();
Document fibonacci = impl.createDocument(null, "Fibonacci_Numbers", null);
BigInteger low = BigInteger.ZERO;
BigInteger high = BigInteger.ONE;
Element root = fibonacci.getDocumentElement();
for (int i = 0; i <= 25; i++) {
Element number = fibonacci.createElement("fibonacci");
number.setAttribute("index", Integer.toString(i));
Text text = fibonacci.createTextNode(low.toString());
number.appendChild(text);
root.appendChild(number);
BigInteger temp = high;
high = high.add(low);
low = temp;
}
try {
// Now that the document is created we need to *serialize* it
FileOutputStream out = new FileOutputStream("fibonacci_dom.xml");
OutputFormat format = new OutputFormat(fibonacci);
XMLSerializer serializer = new XMLSerializer(out, format);
serializer.serialize(root);
out.flush();
out.close();
}
catch (IOException e) {
System.err.println(e);
}
}
catch (DOMException e) {
e.printStackTrace();
}
}
}
62 lines vs. 42 lines