PL/SQL from Java

ok, bad i have this pl/sql procedure

 function prihlasenie_elm  (icLogin      varchar2,
                             icPassword   varchar2,
                             ocSID        OUT varchar2,
                             onErrProtId  OUT NUMBER) return boolean;

I call this procedure from java
      CallableStatement cstmt = dbConn.prepareCall("{? = call
s_k_prihlasenie.prihlasenie_elm(?, ?, ?, ?)}");
      cstmt.setString(2,login);
      cstmt.setString(3,password);
      cstmt.registerOutParameter(1,Types.INTEGER); //i don't know which type
i must write here????
      cstmt.registerOutParameter(4,Types.VARCHAR);
      cstmt.registerOutParameter(5,Types.NUMERIC);

Thanks for your help.
            David