Displaying the last row value + 1

Question

Hi, I am sure the answer is out there, I just can't find despite hunting around. So a point in the right direction would be great if possible:
I am trying to display the 'future' number from an auto update primary key in an access d/base. I am getting the current number with the code below which obviously means that I just need to add 1 to it; if only it would let me have the result as an integer, but I can't seem to achieve that (can only get a string) therefore tried to make the string an integer, update, change it back & then display in textField, but I can't achieve that either...please help?
  public void findCurrentRow()
    try
      query = "SELECT (customerID) from Professional";
      stmt = myConnection.createStatement();
      rs = stmt.executeQuery(query);
      int i = 1;
      while(rs.next())
        rowNumber = rs.getString(i);
      id.setText(rowNumber);
      id.setEditable(false);
      rs.close();
    catch (SQLException ex)
      fatalError(ex);
  }

Answer 1

I meant to ask why this did not work for you below ?
int rowNumber = rs.getInt(1);//returns an int type
the resultset method getInt() is not returning a integer?
I guessed that you were getting a non numerical return so you decided to return the value to a string getString() and see what was happening like the record value being returned was a float or other non-int type.
int rowNumber = Integer.parseInt(rs.getString(1));
A little off topic you could write your query to be
SELECT (WHATEVER) +1 FROM TABLE; //adds 1 to value
or if the DB has a nextVal func for sequences use that.
Ray