setNString(String parameterName, String value)
Syntax:
void setNString(String parameterName,
                String value)
                throws SQLException
                                        Description:
Sets the designated parameter to the given String object. The driver converts this to an SQL NCHAR or NVARCHAR or LONGNVARCHAR value (depending on the argument's size relative to the driver's limits on NVARCHAR values) when it sends it to the database.
Parameters:
parameterName
the name of the parameter
value
the parameter value
Throws:
SQLException - if a database access error occurs, parameterName is not a valid parameter name, or the prepared statement has been closed
Reference:
For more information, reference JDBC documentation for: CallableStatement.setNString(String, String)