problème en parcourant un fichier xml en utilisant jdom

j'ai besoin de l'aide svp
j'ai besoin de parcourir un fichier xml
voici une partie de mon fichier xml

Code:

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<packagedElement xmi :type="uml:Class" xmi:id="_2-HEIBw3EeCGMNb5jnZ1lA" name="BATTERY">
- <ownedAttribute xmi:id="_m-deoBw5EeCGMNb5jnZ1lA" name="bUS" type="_SOQ4EBw3EeCGMNb5jnZ1lA" isUnique="false" association="_m8E5ABw5EeCGMNb5jnZ1lA">
  <upperValue xmi:type="uml:LiteralUnlimitedNatural" xmi:id="_m-deohw5EeCGMNb5jnZ1lA" value="1" /> 
  <lowerValue xmi:type="uml:LiteralInteger" xmi:id="_m-deoRw5EeCGMNb5jnZ1lA" value="1" /> 
  </ownedAttribute>
- <ownedAttribute xmi:id="_PbT_QC7CEeCzNId5TEMyRg" name="capacity" visibility="public" isUnique="false">
  <type xmi:type="uml:DataType" href="pathmap://Papyrus_PROFILES/MARTE_Library.library.uml#_B5VngBFQEdyUJeMeN__D-A" /> 
  <upperValue xmi:type="uml:LiteralUnlimitedNatural" xmi:id="_f3do0TPJEeCXYsCxraXbZg" value="1" /> 
  <lowerValue xmi:type="uml:LiteralInteger" xmi:id="_f3do0DPJEeCXYsCxraXbZg" value="1" /> 
- <defaultValue xmi:type="uml:LiteralString" xmi:id="_f3nZ0DPJEeCXYsCxraXbZg">
  <value xsi:nil="true" /> 
  </defaultValue>
  </ownedAttribute>
- <ownedAttribute xmi:id="_Pl43kC7CEeCzNId5TEMyRg" name="Tension_battery" visibility="public" isUnique="false">
  <type xmi:type="uml:DataType" href="pathmap://Papyrus_PROFILES/MARTE_Library.library.uml#_B5VngBFQEdyUJeMeN__D-A" /> 
  <upperValue xmi:type="uml:LiteralUnlimitedNatural" xmi:id="_q8KFUDPJEeCXYsCxraXbZg" value="1" /> 
  <lowerValue xmi:type="uml:LiteralInteger" xmi:id="_q8A7YDPJEeCXYsCxraXbZg" value="1" /> 
- <defaultValue xmi:type="uml:LiteralString" xmi:id="_q8KFUTPJEeCXYsCxraXbZg">
  <value xsi:nil="true" /> 
  </defaultValue>
  </ownedAttribute>
  </packagedElement>
- <packagedElement xmi:type="uml:Class" xmi:id="_937boBw3EeCGMNb5jnZ1lA" name="SDRAM">
- <ownedAttribute xmi:id="_nrdukBw5EeCGMNb5jnZ1lA" name="bUS" type="_SOQ4EBw3EeCGMNb5jnZ1lA" isUnique="false" association="_np-g0Bw5EeCGMNb5jnZ1lA">
  <upperValue xmi:type="uml:LiteralUnlimitedNatural" xmi:id="_nrnfkRw5EeCGMNb5jnZ1lA" value="*" /> 
  <lowerValue xmi:type="uml:LiteralInteger" xmi:id="_nrnfkBw5EeCGMNb5jnZ1lA" /> 
  </ownedAttribute>
- <ownedAttribute xmi:id="_skPbYBw5EeCGMNb5jnZ1lA" name="bUS" type="_SOQ4EBw3EeCGMNb5jnZ1lA" isUnique="false" association="_shj60Bw5EeCGMNb5jnZ1lA">
  <upperValue xmi:type="uml:LiteralUnlimitedNatural" xmi:id="_skPbYhw5EeCGMNb5jnZ1lA" value="1" /> 
  <lowerValue xmi:type="uml:LiteralInteger" xmi:id="_skPbYRw5EeCGMNb5jnZ1lA" value="1" /> 
  </ownedAttribute>
  </packagedElement>
- <packagedElement xmi:type="uml:Class" xmi:id="_PvAK4Bw4EeCGMNb5jnZ1lA" name="DMA">
- <ownedAttribute xmi:id="_KqeroBw5EeCGMNb5jnZ1lA" name="bUS" type="_SOQ4EBw3EeCGMNb5jnZ1lA" isUnique="false" association="_KpcJ0Bw5EeCGMNb5jnZ1lA">
  <upperValue xmi:type="uml:LiteralUnlimitedNatural" xmi:id="_Kqerohw5EeCGMNb5jnZ1lA" value="*" /> 
  <lowerValue xmi:type="uml:LiteralInteger" xmi:id="_KqeroRw5EeCGMNb5jnZ1lA" /> 
  </ownedAttribute>
- <ownedAttribute xmi:id="_a_pjQBw5EeCGMNb5jnZ1lA" name="bUS" type="_SOQ4EBw3EeCGMNb5jnZ1lA" isUnique="false" association="_a-AkgBw5EeCGMNb5jnZ1lA">
  <upperValue xmi:type="uml:LiteralUnlimitedNatural" xmi:id="_a_pjQhw5EeCGMNb5jnZ1lA" value="*" /> 
  <lowerValue xmi:type="uml:LiteralInteger" xmi:id="_a_pjQRw5EeCGMNb5jnZ1lA" /> 
  </ownedAttribute>
- <ownedAttribute xmi:id="_k6I2cBw5EeCGMNb5jnZ1lA" name="bUS" type="_SOQ4EBw3EeCGMNb5jnZ1lA" isUnique="false" association="_k4zZsBw5EeCGMNb5jnZ1lA">
  <upperValue xmi:type="uml:LiteralUnlimitedNatural" xmi:id="_k6SncRw5EeCGMNb5jnZ1lA" value="*" /> 
  <lowerValue xmi:type="uml:LiteralInteger" xmi:id="_k6SncBw5EeCGMNb5jnZ1lA" /> 
  </ownedAttribute>
- <ownedAttribute xmi:id="_sGl2EBw5EeCGMNb5jnZ1lA" name="bUS" type="_SOQ4EBw3EeCGMNb5jnZ1lA" isUnique="false" association="_sE83UBw5EeCGMNb5jnZ1lA">
  <upperValue xmi:type="uml:LiteralUnlimitedNatural" xmi:id="_sGl2Ehw5EeCGMNb5jnZ1lA" value="1" /> 
  <lowerValue xmi:type="uml:LiteralInteger" xmi:id="_sGl2ERw5EeCGMNb5jnZ1lA" value="1" /> 
  </ownedAttribute>
- <ownedAttribute xmi:id="_8x9nMBw5EeCGMNb5jnZ1lA" name="aSIC" type="_I978MBw3EeCGMNb5jnZ1lA" isUnique="false" association="_8wUocBw5EeCGMNb5jnZ1lA">
  <upperValue xmi:type="uml:LiteralUnlimitedNatural" xmi:id="_8yGxIRw5EeCGMNb5jnZ1lA" value="*" /> 
  <lowerValue xmi:type="uml:LiteralInteger" xmi:id="_8yGxIBw5EeCGMNb5jnZ1lA" /> 
  </ownedAttribute>
  </packagedElement>

et voici mon code qui m'affiche rien!

Code:

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	import java.io.*;
	import org.jdom.*;
	import org.jdom.input.*;
	import org.jdom.filter.*;
	import java.util.List;
import java.util.Iterator;

	public class ParsingXML
	{
		static org.jdom.Document document;
	   static Element racine;
	   static void afficheALL()
	   {
	     
	      List listpackage = racine.getChildren("packagedElement");
	     
	           //On crée un Iterator sur notre liste
	      Iterator i = listpackage.iterator();
	   
            while(i.hasNext())//if(i.hasNext())
	      {
	         //On recrée l'Element courant à chaque tour de boucle 
	     
                   Element courant = (Element)i.next();
	           System.out.println(courant.getAttributeValue("name"));
		        
	      }//else System.out.println("aucun suivant");	    
	   }	  
	   public static void main(String[] args)
	   {
	      //On crée une instance de SAXBuilder
	      SAXBuilder sxb = new SAXBuilder();
	      try
	      {
	         document = sxb.build(new File("chemin du fichier.xml"));
	      }
	      catch(Exception e){}

	      //On initialise un nouvel élément racine avec l'élément racine du document.
	      racine = document.getRootElement();
         
	      afficheALL();
	  	   }
	}

merci de m'aider svp