ArrayList<String>textcomment = new ArrayList<String>();
for(int i = 0;i<nl.getLength();i++)
{
    Element e = (Element)nl.item(i);
    // crash on this string find first time a value and second time find </no_of_comments>
    String noOfcomment = e.getElementsByTagName("no_of_comments").item(0).getFirstChild ().getNodeValue();
    aryNoOfcomment.add(i, noOfcomment);
}

String noOfcomment = e.getElementsByTagName ("no_of_comments"). item (0). getFirstChild (). getNodeValue ();

List<String> yourList = new ArrayList<String>();
NodeList nl = e.getElementsByTagName ("no_of_comments");
if(nl != null){
    for(int i = 0;i<nl.getLength();i++)
    {
        Node n = nl.item(i).getFirstChild();
        if(n!=null){
             String value = n.getNodeValue();
             yourList.add(value);
        }
    }
}

FileInputStream fi = new FileInputStream(dir);
builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
doc =  builder.parse(fi);

NodeList nlorgid = doc.getElementsByTagName("Organization");
String orgidfromxml = ((Element)nlorgid.item(0)).getAttribute("id");
System.out.println(" organization id from xml is "+orgidfromxml);