Records Retreiving In Hashtable

Question

I got problem regarding hashtable..
Actually i wrote a query which gets all results in descending order and i am putting these values in to Hashtable .while Enumerating(retreiving) i am not getting the records orderly as i had set in Hashtable.
Could you please tell anybody what is the problem ?
for this i used following code :
import java.util.* ;
import java.sql.* ;
public class HashTest {
     public static void main(String args[]) throws Exception {
          String str ;
          Hashtable hashtable = new Hashtable() ;
          Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
          Connection conn = DriverManager.getConnection("jdbc:odbc:datasourcename","userid","password");
          Statement stmt = conn.createStatement();
          String query = "select to_number(rtrim(ltrim(id))) , name from users order by 1 desc" ;
          ResultSet rset = stmt.executeQuery(query);
          while(rset.next()) {
               hashtable.put(rset.getString(1),rset.getString("name"));
          Enumeration enum = hashtable.keys() ;
          while(enum.hasMoreElements()) {
               str = (String)enum.nextElement();          
               System.out.println(str + " : " + hashtable.get(str));

Answer 1

There is a very good reason for this. There is no ordering in a Hashtable, so there is no way for the enumeration to know the order as it is not maintained. In any case there is no guarantee that an enumeration will respect the ordering even if there was one.
Sorry I couldn't be more help.
PS. I noticed you posted this three times, I assume by mistake as they are posted within a few minutes of each other but be more careful in the future.