[java] MySQL & Java - Get id of the last inserted value (JDBC)

Possible Duplicate:
How to get the insert ID in JDBC?

Hi, I'm using JDBC to connect on database through out Java.

Now, I do some insert query, and I need to get the id of last inserted value (so, after a stmt.executeUpdate).

I don't need something like SELECT id FROM table ORDER BY id DESC LIMIT 1, because I may have concurrency problems.

I Just need to retrieve the id associated to the last insertion (about my instance of the Statement).

I tried this, but seems it doesn't work on JDBC :

public Integer insertQueryGetId(String query) {
    Integer numero=0;
    Integer risultato=-1;
    try {
        Statement stmt = db.createStatement();
        numero = stmt.executeUpdate(query);

        ResultSet rs = stmt.getGeneratedKeys();
        if (rs.next()){
            risultato=rs.getInt(1);
        }
        rs.close();

        stmt.close();
    } catch (Exception e) {
        e.printStackTrace();
        errore = e.getMessage();
        risultato=-1;
    }
  return risultato;
}

In fact, every time risultato = -1, and I get java.sql.SQLException: Generated keys not requested. You need to specify Statement.RETURN_GENERATED_KEYS to Statement.executeUpdate() or Connection.prepareStatement().

How can I fix this problem? Thanks Stackoverflow People :)

Alternatively you can do:

Statement stmt = db.prepareStatement(query, Statement.RETURN_GENERATED_KEYS);
numero = stmt.executeUpdate();

ResultSet rs = stmt.getGeneratedKeys();
if (rs.next()){
    risultato=rs.getString(1);
}

But use Sean Bright's answer instead for your scenario.