The Oracle TIMESTAMP WITH LOCAL TIME ZONE data type is mapped to the JDBC TIMESTAMP data type.
When retrieving TIMESTAMP WITH LOCAL TIME ZONE columns, the value returned to the user is converted to the time zone specified by the TIME_ZONE session parameter.
When setting TIMESTAMP WITH LOCAL TIME ZONE columns:
Using a timestamp (using PreparedStatement.setTimestamp, for example), the value set is converted to the time zone specified by the TIME_ZONE session parameter.
Using a string (using PreparedStatement.setString(), for example), the string is passed as-is to the server. The supplied string must be in the format specified by the NLS_TIMESTAMP_TZ_FORMAT session parameter. If not, the Oracle server generates an error when it attempts to convert the string to the TIMESTAMP WITH LOCAL TIME ZONE type.
Using a timestamp (using PreparedStatement.setTimestamp, for example), the value set is converted to the time zone specified by the TIME_ZONE session parameter.