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java Programming Glossary: vehicleJava Generics WildCard Question: List<? extends A> http://stackoverflow.com/questions/5495383/java-generics-wildcard-question-list-extends-a Question List extends A Let's say I have these classes Vehicle Car and Spaceship class Vehicle void rideVehicle Vehicle v System.out.println.. say I have these classes Vehicle Car and Spaceship class Vehicle void rideVehicle Vehicle v System.out.println I am riding a.. classes Vehicle Car and Spaceship class Vehicle void rideVehicle Vehicle v System.out.println I am riding a vehicle class Car..
Avoiding parallel inheritance hierarchies http://stackoverflow.com/questions/696350/avoiding-parallel-inheritance-hierarchies hierarchies I have two parallel inheritance chains Vehicle Car Truck etc. VehicleXMLFormatter CarXMLFormatter TruckXMLFormatter.. two parallel inheritance chains Vehicle Car Truck etc. VehicleXMLFormatter CarXMLFormatter TruckXMLFormatter etc. My experience.. am thinking of using the Visitor pattern. public class Car Vehicle public void Accept IVehicleFormatter v v.Visit this public..
Java Generic List<List<? extends Number>> http://stackoverflow.com/questions/746089/java-generic-listlist-extends-number this question In Java if Car is a derived class of Vehicle then we can treat all Cars as Vehicles a Car is a Vehicle ... a derived class of Vehicle then we can treat all Cars as Vehicles a Car is a Vehicle . However a List of Cars is not also a List.. Vehicle then we can treat all Cars as Vehicles a Car is a Vehicle . However a List of Cars is not also a List of Vehicles . We..
Why use Interfaces, Multiple Inheritance vs Interfaces, Benefits of Interfaces? http://stackoverflow.com/questions/8531292/why-use-interfaces-multiple-inheritance-vs-interfaces-benefits-of-interfaces Object effectively has two identities a Tank is both a Vehicle and a Weapon . You can use an instance of Tank where either..
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