Where should i include my conn.close() command

Question

Hi,
My code frequently fetches data from database, so i created a class like this
public class ConnectToDatabase { /*            public ConnectToDatabase()                 {                                 Connection conn;                 } */ public ResultSet selectS(String userQuery) throws Exception { String userName = "root"; String userPassword = "gal"; String databaseUrl = "jdbc:mysql://localhost:3306/test"; Class.forName ("com.mysql.jdbc.Driver"); Connection conn = DriverManager.getConnection (databaseUrl, userName, userPassword); String query = userQuery; Statement S=conn.createStatement(); ResultSet RS=S.executeQuery(query);                                 //conn.close;    ( "a" ) return RS;                                 //conn.close;    (" b ") } /*              public void closeConnection()                 {                                 conn.close;                 } */ }
and from the main code i make call as given below (it works fine)
ConnectToDatabase CTD=new ConnectToDatabase(); ResultSet result=CTD.selectS(String userQuery); //CTD.closeConnection();
Now my problem is
1) If try to give "conn.close()" before "return RS;"(marked by "a") It will show error (RS cannot be fetched after closing connectio)
2) If write conn.close after return it wont be executed (ofcourse - unreachable statement) ( "b" )
3) If use "CTD.closeConnection();" it gives errror saying that "cannot find conn(in closeConnection()) " i dont know why constructor is not loaded.(rest of commented lines when uncommented)
Where should i use conn.close statement? I dont want any change in my return type or parameters...

Answer 1

I used like this
public class ConnectToDatabase
   Connection conn;
   public ResultSet selectS(String userQuery,String[] userInput,int inputNumber )
       //code to select
   public void closeC()
       conn.close();
}and from main class
ConncetToDatabase CTD=new ConnectToDatabase();
ResultSet RS=CTD.selectS(x,y,z) ;
CTD.closeC();