hello, im new to java. i hav a code in which is it should not print duplicate values

[ranjitha55]

but it is displaying al values der in xml file.it should avoid reading duplicate values ,pls help me..
my code is,

public class nm {
public static void main(String argv[]) {
 
  try {
  File file = new File("c://adv.xml");
  DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
  DocumentBuilder db = dbf.newDocumentBuilder();
  Document doc = db.parse(file);
  doc.getDocumentElement().normalize();
  System.out.println("Root element " + doc.getDocumentElement().getNodeName());
  NodeList nodeLst = doc.getElementsByTagName("Z12");
  for (int s = 0; s < nodeLst.getLength(); s++) {
 
        Node fstNode = nodeLst.item(s);
 
        if (fstNode.getNodeType() == Node.ELEMENT_NODE) {
 
               Element fstElmnt = (Element) fstNode;
          NodeList fstNmElmntLst = fstElmnt.getElementsByTagName("Value");
          Element fstNmElmnt = (Element) fstNmElmntLst.item(0);
          NodeList fstNm = fstNmElmnt.getChildNodes();
          //System.out.println("value : "  + ((Node) fstNm.item(0)).getNodeValue());
          NodeList lstNmElmntLst = fstElmnt.getElementsByTagName("DisplayName");
          Element lstNmElmnt = (Element) lstNmElmntLst.item(0);
          NodeList lstNm = lstNmElmnt.getChildNodes();
          String zf=((Node) lstNm.item(0)).getNodeValue();
 
              System.out.println("Diaplay Name : " + zf);
 
        }
 
      }
      } catch (Exception e) {
        e.printStackTrace();
      }
     }
    } 

this is my code,
ouput is,
Root element Search_Config
value : BC
Diaplay Name : Bearing complete
value : BC01
Diaplay Name : Bearing complete 01
value : BC
Diaplay Name : Bearing complete
value : BC01
Diaplay Name : Bearing complete 01

but here i want bc, bc01 shoud print only once not twice.

[JosAH]

For every element with index i in your list check whether it is also in the list at
position [0,i-1]. If it is, don't print it because you have seen it in the list before.

Hint: make a separate, private, little (boolean) method to search for the element.

kind regards,

Jos