public void setNull (int parameterIndex, int sqlType, String typeName) throws  SQLException { setNull(parameterIndex, sqlType); isParamSet[parameterIndex - 1] = true;
public void setNull(int parameterIndex, int sqlType) throws  SQLException { getField(parameterIndex).setNull(); isParamSet[parameterIndex - 1] = true;
     public void setNull (int parameterIndex, int sqlType, String typeName) throws  SQLException {         setNull(parameterIndex, sqlType); //all nulls are represented the same... a null reference         isParamSet[parameterIndex - 1] = true;    }