Problem in parsing nested tags in xml

I have an xml that i am parsing through DOM parser. the xml is of somewhat this sequence

 <root>
   <item1> abc </item1>
   <item2> def </item2>
   <item3> ghi </item3>
   <item4>
        <subItem4>
   开发者_开发百科           <name> xyz </name>
              <id>   1  </id>
        </subItem4>
        <subItem4>
              <name> asd </name>
              <id>   2  </id>
        </subItem4>
   </item4>
</root>

According to this dummy xml i am reaching till subItem 4 but not to the childern of it. what i am trying is as follows to get innermost Items is:

NodeList slide = theElement.getElementsByTagName("item4").item(0).getChildNodes();

        for(int i = 0; i<slide.getLength(); i++)
        {
            NodeList subSlides = theElement.getElementsByTagName("subItem4").item(0).getChildNodes();

                for (int j=0; j<subSlides.getLength(); j++)
                {
                    String subSlide_title   = subSlides.item(i).getFirstChild().getNodeValue();             

                }
        }

its not working. please can someone identify where am i doing the mistake in parsing. Any help is appreciated.

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You are not using valid XML - you can't have spaces in tag names.

XML Names cannot contain white space, see here for valid values.

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Update (following comment that the posted sample is representative of the actual XML):

Your access via the indexer of the node list is incorrect:

String subSlide_title = subSlides.item(i).getFirstChild().getNodeValue();

Try this instead (using j instead of i, as the inner loop variable is called):

String subSlide_title = subSlides.item(j).getFirstChild().getNodeValue();

---

NodeList nodes = doc.getElementsByTagName("item");
 for (int i = 0; i < nodes.getLength(); i++) {
     Element element = (Element) nodes.item(i);
     NodeList nodesimg = element.getElementsByTagName("name");
     for (int j = 0; j < nodesimg.getLength(); j++) {
        Element line = (Element) nodesimg.item(j);
        String value=getCharacterDataFromElement(line);
     }
}
public static String getCharacterDataFromElement(Element e) {
  Node child = e.getFirstChild();
  if (child instanceof CharacterData) {
     CharacterData cd = (CharacterData) child;
     return cd.getData();
  }
  return "?";
}

I think above code will help you in parsing xml file.

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The XML elements are all messed up. There are literally 2 lines that don't have mistakes in them.

For instance

<subItem 4> 

is syntactically wrong and I don't see what logical sense you could make out of it.

Do you mean

<subItem4> 

as in the fourth sub item or

<subItem someAttribute="4">

I'd recommend learning XML, it's very simple... http://www.w3schools.com/xml/default.asp