Displaying a matrix using DOM

Question

hi group,
this is satya chowdhury .i am facing some problem in how to parse a matrix using dom.the xml file is as follows:-
<?xml version="1.0" ?>
- <matrix>
<rows>4</rows>
<columns>4</columns>
- <row>
<column>11</column>
<column>12</column>
<column>13</column>
<column>14</column>
</row>
- <row>
<column>21</column>
<column>22</column>
<column>23</column>
<column>24</column>
</row>
- <row>
<column>31</column>
<column>32</column>
<column>33</column>
<column>34</column>
</row>
- <row>
<column>41</column>
<column>42</column>
<column>43</column>
<column>44</column>
</row>
</matrix>
and the program is as follows
import java.io.File;
import java.io.*;
import javax.xml.parsers.*;
import org.w3c.dom.*;
import org.xml.sax.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.ErrorHandler;
public class Matadd
     static Document doc;
static int mat[][]=new int[0][0];
     public static void main(String arg[])
          DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
          try
          DocumentBuilder builder=factory.newDocumentBuilder();
          builder.setErrorHandler(new Terror());
          doc=builder.parse(new File("mat.xml"));
          Element root=doc.getDocumentElement();
          NodeList list=doc.getElementsByTagName("row");
          int i=list.getLength();
          System.out.println("THE NO.OF ROWS IN THE GIVEN MATRIX--->"+i);
          NodeList list1=doc.getElementsByTagName("column");
          int j=list.getLength();
          System.out.println("THE NO.OF COLUMNS IN THE GIVEN MATRIX--->"+j);
for(int row=0;row<i;row++)
for(int col=0;col<j;col++)
     Node node=list1.item(col).getLastChild();
          System.out.println(""+node.getNodeValue());
          catch(SAXException e)
          catch(IOException e)
          catch(ParserConfigurationException e)
          static class Terror implements ErrorHandler
                              public void fatalError(SAXParseException e)
                                   System.out.println("error:"+e);
                         public void error(SAXParseException e)
                                   System.out.println("error:"+e);
                              public void warning(SAXParseException e)
                                        System.out.println("error:"+e);
BUT IS IS NOT ITERATING ALL THE ROWS.PLZ HELP ME.I HAVE TO SUBMIT THE ASSIGNMENT TODAY.
BYE
SATYABRATA
[email protected]

Answer 1

i have modified ur cod e..this is working..i have created on recursive function that will iterate through ur colum values...
any comments please let me knoe
reagards
shanu
[email protected]
import java.io.File;
import java.io.*;
import javax.xml.parsers.*;
import org.w3c.dom.*;
import org.xml.sax.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.ErrorHandler;
* @author sm23772
* TODO To change the template for this generated type comment go to
* Window - Preferences - Java - Code Style - Code Templates
public class SimpleParse {
     static Document doc;
     static int mat[][]=new int[0][0];
     public static void main(String[] args) {
          DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
          try
          DocumentBuilder builder=factory.newDocumentBuilder();
          doc=builder.parse(new File("test.xml"));
          Element root=doc.getDocumentElement();
          NodeList list=doc.getElementsByTagName("row");
          int i=list.getLength();
          System.out.println("THE NO.OF ROWS IN THE GIVEN MATRIX--->"+i);
          NodeList list1=doc.getElementsByTagName("column");
          int j=list.getLength();
          System.out.println("THE NO.OF COLUMNS IN THE GIVEN MATRIX--->"+j);
          for (Node child = root.getFirstChild();
child != null;
child = child.getNextSibling())
if(child.getNodeName().equals("row"))
     getValues(child); //calling my recursive funciton
/************** instead of this i have made small funciton ******************/
          /*for(int row=0;row<i;row++)
          for(int col=0;col<j;col++)
          Node node=list1.item(col).getLastChild();
          System.out.println(""+node.getNodeValue());
System.out.println("");
          catch(Exception e)
               System.out.println(e);
public static void getValues(Node start)
if(start.getNodeName().equals("column"))
System.out.println(start.getFirstChild().getNodeValue());
for (Node child = start.getFirstChild();
child != null;
child = child.getNextSibling())
     getValues(child);
}