No access to method from within the same class

Question

Hey there.
First I have to excuse my English for I'm german and just learning...
Ok, my problem is as follows. I have a class called JDBC_Wrapper it includes the method sendQuery(String query). When I call this method from within another class (where 'wrapper' is my instance of JDBC_Wrapper) it works fine. For example:
wrapper.sendQuery("SELECT * FROM myDataBase");
But then I have written a method called getNumRows() into my JDBC_Wrapper class.
This method should send a query through sendQuery(Strin query) but when calling getNumRows() it says: "java.sql.SQLException: [FileMaker][ODBC FileMaker Pro driver][FileMaker Pro]Unbekannter Fehler." (Unbekannter Fehler -> Unknown Exception). What could that be?
I'm using jdk2 sdk 1.4.2 with BlueJ. My database is Filemaker Pro 6. The ODBC/JDBC connector works fine.
BerndZack

Answer 1

This is within my JDBC_Wrapper class:
public ResultSet sendQuery(String query)
        if(connected)
            try
                Statement s = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
                ResultSet rs = s.executeQuery(query);
                return rs;
            catch(Exception e)
                System.out.println(e);
        else
            //System.out.println("There is no connection to the datasource!");
        return null;
public int getNumRows()
        try
            ResultSet r;
            r = this.sendQuery("SELECT COUNT(*) FROM " + table_name); // At this line the error occurs
            r.next();
            return (int)r.getInt(1);
        catch(Exception e)
            System.out.println(e.getMessage());
            return -1;
}When I call sendQuery() from within another class it works, but calling getNumRows()
throws an exception.