Mysql Query VS Vector Object

Question

I run mysql query using Java, and the results of it are put in a vector object. Due to the vector object is made by 1 element (it's sure because I wrote the database) I'd like to take it and put it in a string variable, but Java returns me a lot of exceptions; here is the code:
public Vector eseguiQuery(String query) {
     Vector v = null;
     String [] record;
     int colonne = 0;
     try {
        Statement stmt = db.createStatement();     // Creo lo Statement per l'esecuzione della query
        ResultSet rs = stmt.executeQuery(query);   // Ottengo il ResultSet dell'esecuzione della query
        v = new Vector();
        ResultSetMetaData rsmd = rs.getMetaData();
        colonne = rsmd.getColumnCount();
        while(rs.next()) {   // Creo il vettore risultato scorrendo tutto il ResultSet
           record = new String[colonne];
           for (int i=0; i<colonne; i++) record[i] = rs.getString(i+1);
           v.add( (String[]) record.clone() );
        rs.close();     // Chiudo il ResultSet
        stmt.close();   // Chiudo lo Statement
     } catch (Exception e) { e.printStackTrace(); errore = e.getMessage(); }
     return v;
public String autentica(String query){
          String s = (String) db.eseguiQuery(query).get(0);
          System.out.println(s);
          return s;
     }...Please help me!

Answer 1

1. You're not calling ResultSet.next() to move the result set onto the first row of results.
2. (Edit) Deleted because you were in fact closing your objects, though you should still use a finally block to make absolutely certain.
3. The exceptions tell you what the problem is - when you post a question please include these.
Edited by: dcminter on 06-Aug-2008 17:04