Cant update Multiple Rows of a table display from DB

Question

Problem encounter is that only 1st row of table can be updated
the rest of it cant seem to be updated
anyone of ya know the problem pls mail me the ans. for this
thks alot
<%@ page import = "java.sql.*" %>
<%@ page import = "java.util.*"%>
<%
String url= "jdbc:odbc:msaccess";
     String id = "iastudent";
     String pass = "iastudent";
     Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
     Connection conn = DriverManager.getConnection(url, id, pass);
     Statement stmt = conn.createStatement();
Enumeration parameters= request.getParameterNames();
while(parameters.hasMoreElements()){
String Type = request.getParameter("a");
String Price = request.getParameter("b");
String Col = request.getParameter("col");
int T = Integer.parseInt(request.getParameter("t"));
try{ 
String Mod="UPDATE PCLOGIC "+
"SET F6 = '"+Type+"', "+
" F7 = '"+Price+"' "+
"WHERE F2 = '"+Col+"' ";
stmt.executeUpdate(Mod);
if(request.getParameter("a")!= null && request.getParameter("b")!= null){
pageContext.forward("LogicPC10.jsp");}
stmt.close();
conn.close();
catch (ArithmeticException e){
out.println("error msg:");%><BR><%     
out.println(e.getMessage());%><BR><%
%>

Answer 1

Enumeration parameters= request.getParameterNames();
while(parameters.hasMoreElements()){
String Type = request.getParameter("a");
String Price = request.getParameter("b");
String Col = request.getParameter("col");
int T = Integer.parseInt(request.getParameter("t"));What he means is to use an array to store the values of your params.
eg,
String[] params = request.getParameterValues();
for(int i=0;i< params.length;i++)
// insert into DB
}