Retrieves the value of a JDBC DOUBLE parameter as a double in the Java programming language.

Parameters:

parameterName the name of the parameter

Returns: the parameter value. If the value is SQL NULL, the result is 0.

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