Retrieves the value of the designated NCHAR, NVARCHAR or LONGNVARCHAR parameter as a String in the Java programming language.

For the fixed-length type JDBC NCHAR, the String object returned has exactly the same value the SQL NCHAR value had in the database, including any padding added by the database.

Parameters:

parameterName the name of the parameter

Returns: a String object that maps an NCHAR, NVARCHAR or LONGNVARCHAR value

Exceptions:

SQLException if parameterName does not correspond to a named parameter; if a database access error occurs or this method is called on a closed CallableStatement

SQLFeatureNotSupportedException if the JDBC driver does not support this method

`SQLException`		if parameterName does not correspond to a named parameter; if a database access error occurs or this method is called on a closed `CallableStatement`
`SQLFeatureNotSupportedException`		if the JDBC driver does not support this method