JComboBox or JList with SQL queries. Best practises.

Question

Hi!
I'm wondering what you do in the following situation, providing you develop a hotel reservation application and you have a form where you enter room details: room number, number of rooms, description and type (JComboBox).
So when executing an INSERT query what do you usually do? Do you store ID's of types or execute addtion SELECT query to get the if of the selected type?

Answer 1

Thank you very much! I like your approach, but what if I should fill in a form automatically? I mean I have a section in my application where you can edit rooms, you choose a room from a JList and fter clicking on a particular room, the fields of the form get entered and if I have a JComboBox there what should I do?
I use this approach:
<code>
public void valueChanged ( ListSelectionEvent e )
Item item = ( Item ) lRooms.getSelectedValue();
try {
Db db = new Db ();
ResultSet rs = db.executeQuery ( "SELECT * FROM rooms " +
"WHERE id = " + item.getId () );
rs.next ();
pRoomsEdit.this.id = rs.getInt ( "id" );
tfNo.setText ( item.getName () );
ComboBoxModel cbm = cbType.getModel ();
ResultSet rsType = db.executeQuery ( "SELECT name FROM types " +
"WHERE id = " + rs.getString ( "type" ) );
rsType.next ();
cbm.setSelectedItem ( new Item ( rs.getInt ( "id" ), rsType.getString ( "name" ) ) );
tfRoomNum.setText ( rs.getString ( "roomNum" ) );
taDesc.setText ( rs.getString ( "description" ) );
catch ( SQLException se ) {
se.printStackTrace ();
</code>