Populate text field based on the lov selected value

Hi,
based on the value selected in lov, i want to populate another text field. Below is the code I have written
In PFR:
if(pageContext.isLovEvent())
String lovInputSourceId = pageContext.getParameter(SOURCE_PARAM);
if ("lovCategory".equals(lovInputSourceId))
java.util.Hashtable lovResults = pageContext.getLovResultsFromSession(lovInputSourceId);
if(lovResults!=null)
String value =(String)lovResults.get("lovCategory");
amobj.categorycode(value);
AMImpl code:
public void categorycode(String code) {
sundryCodeVOImpl vobj = getsundryCodeVO1();
vobj.setWhereClause( "lookup_code = "+"'"+code+"'");
vobj.reset();
vobj.executeQuery();
String desc = vobj.first().getAttribute("Description").toString();
String attr = vobj.first().getAttribute("Attribute1").toString();
testEOViewImpl vobj1 = gettestEOView1();
vobj1.getCurrentRow().setAttribute("CodeDescription",desc);
vobj1.getCurrentRow().setAttribute("PurchasingCategoryCd",attr);
vobj1.executeQuery();
With this code, the updated values for the attributes CodeDescription, PurchasingCategoryCd are getting inserted into the database table but they are now showing up in the text fields when a value is selected in lov.
Please tell me what is the mistake I'm doing.
Thanks
Sunny

I'm using Lov Map to populate the lov field say field A. But I need to populate another field say field B based on the value selected in field A.
to give an example of my requirement. Consider a view object having attributes col1,col2,col3 and having following data.
col1--col2--col3
1-----a-------x
2-----b------y
3-----c------z
I 'll populate the lov of field A with values in col1. when user selects value 1 in field A. automatically field B should show value 'a'. If user selects value 2 in field A, field B should show value 'b' so on.
Thanks
Sunny

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