If you call ResultSet.getDouble(...), that returns a double not a Double, the documented behavior is that a NULL (from the database) will be returned as zero. (See javadoc linked above.) That is no help if zero is a legitimate value for that column.
If you call ResultSet.getDouble(...), that returns a double not a Double, the documented behavior is that a NULL (from the database) will be returned as zero. (See javadoc linked above.) That is no help if zero is a legitimate value for that column.