Exratcing data of different types from a Vector

Question

Hello Evryone
Hope all is well,
I'm having difficulties in extracting resultsets of different data types, from a vector, the following code is an extract from my remote server implementations; it works fine on the client side providing im only extracting a string.
Server remote method (Implementaions)
public Vector selecta(String query)throws SQLException,
RemoteException
Vector results=new Vector();
       ResultSet rs = statement.executeQuery(query);
       ResultSetMetaData metaData = rs.getMetaData();
       int columns = metaData.getColumnCount();
        int i=0;
          while( rs.next())
        for (int j=0; j<columns; j++)
         results.add(rs.getString( j+1 ));
         results.add(rs.getByte( j+1 ));
  return results;
}The client side extract:
Vector dataVector=new Vector();
   dataVector= data.selecta("SELECT columnname1" +
        "FROM Tablename");
       for (int i = 0; i <dataVector.size() ; i++)
        jcmbo.addItem( dataVector.get(i));
       } the above works only if i want to extract a string, and if the server impl didnt have the getbyte, is it possible pack all the resultset result of diffrent data type from the same table into a vector? and if it is, what mechanism would one use to extract each data type from a vector to put into diffrent components, e.g if one would want to put strings into a combo, like the above, and extract a byte[] with the use of type casting extract from the same vector and put in a lable.
I've been trying and its resulted only in to extracting one data type, can any one please shed some light on the above scienario,
thanking you in advance

Answer 1

you can't do
List list = new ArrayList(); // Better to use this rather than Vector;
list.add(resultSet.getByte(1)); // Compile error - cannot add a primitive to a List.
Instead use
list.add(new Byte(resultSet.getByte(1)));
You will of course on the Clientside need to check what type the column value is...
eg
if(list.get(3) instanceof Byte) {
Byte b = (Byte) list.get(3);
// do stuff here with the Byte instance.
Hope that helps
NB: Better would be to consider a structured approach to storing a result row such as a class whose instance represents a particular row in the results.
Talden