I'm rather new to Java. After just reading some info on path finding, I read about using an empty class as an "interface", for an unknown object type. I'm developing a game in Java based on hospital theme. So far, the user can build a reception desk and a GP's office. They are two different types of object, one is a Building and one is ...
Hello! Can I take a foreign class in Java which conforms to one of my custom interfaces and "cast" it to that interface? Example: public class YouCanNotChangeMe_IAmNotYours{ public void doSomethingSpecial(); } public interface MyInterface{ void doSomethingSpecial(); } Can I use that foreign class in places where my interfac...
I'm trying to create an interface that automatically implements a fully typed out method in VB.Net However, I can't figure out how to do it. I wanna do something that's similar to what happens when you implement IDisposable, where it gives you the full function, including codes and comments. I know how to make a code snippet and how ...
This var h = new HashSet<int>(); var r = h.IsReadOnly; does not compile. I have to do var r = ((ICollection<int>)h).IsReadOnly; why wasn't IsReadOnly implemented normally? (I'm not asking how, but why) ...
Hello: Stephan Walters video on MVC and Models is a very good and light discussion of the various topics listed in this questions title. The one question listed in the notes unanswered was: If you create an Interface / Repository pattern for Linq2SQL, does Linq2SQLs classes still cause a dependency on Linq, even though you pass the cl...
Duplicate Interface vs Base class With C#, when to use Interfaces and when to use Abstract Classes, what can be the deciding factor. ...
I know that in Eclipse, if your class implements an interface or extends an abstract class, there is a quick way to add the method definitions to your class. Can this be done with VS2005? How? ...
Two interfaces of Reporting Engine are possible: sql based for sql based user non-sql Based interface for normal non-sql friendly users Database is very large so how do I go about thinking about 2) option that is Non-sql based interface How would it be ? ...
I think, the following can't be done in Java. But I would be happy to learn how to implement something that resembles it. Suppose we have a class C, that is already used in compiled code. (We can neither change that code nor the original definition of C). Suppose further there is interesting code that could be re-used, if only C would ...
If I have the following interfaces and a class that implements them - IBase = Interface ['{82F1F81A-A408-448B-A194-DCED9A7E4FF7}'] End; IDerived = Interface(IBase) ['{A0313EBE-C50D-4857-B324-8C0670C8252A}'] End; TImplementation = Class(TInterfacedObject, IDerived) End; The following code prints 'Bad!' - Procedure Test; Var A : ...
How would you describe the purpose of an Interface to a student-class that understand basic OOP design? ...
I'm trying to come to terms with using IoC/Dependency Injection while at the same time programming to contracts rather than specific classes. The dilemma I'm having is the tension between: Do program to interfaces for IoC: I started out with IoC relying heavily on interfaces. Judging by Spring's sample projects, interfaces are the way ...
The situation is as follows. public interface IFoo { } public abstract class FooBase : IFoo { } Now I need a collection of IFoo with some additional methods. public class IFooCollection : List<IFoo> { public void UsefullMethod() { } } The problem is that IFooCollection looks like an interface while it is a class. The options ar...
I imagine that we all (when we can be bothered!) comment our interfaces. e.g. /// <summary> /// Foo Interface /// </summary> public interface Foo { /// <summary> /// Will 'bar' /// </summary> /// <param name="wibble">Wibble factor</param> void Bar(string wibble); } Do you also comment the implementation (which may...
Hi, I have had recently two telephone interviews where I've been asked about the differences between an Interface and an Abstract class. I have explained every aspect of them I could think of, but it seems they are waiting for me to mention something specific, and I dont know what it is. From my experience I think the following is tru...
How can I reflect on the interfaces implemented by a given type (of class or interface) in .NET? As the type being reflected on will be generic (both in the implementation sense as well as the semantic sense), it would preferable to do this without having to hardcode an Assembly name, though I realise that I can get this name from the ...
In C# one can state that a generic parameter must implement a certain interface like so: public class Something<T> where T : IComparable { ... } How does one specify this in F#? ...
Is it possible to define a function that takes in a parameter that must implement two interfaces? (The two interfaces are ones I just remembered off the top of my head; not the ones I want to use) private void DoSomthing(IComparable, ICollection input) { } ...
Duplicate: Is it possible to make a parameter implement two interfaces? Looking for a way to do this : public interface INumber1 {} public interface INumber2 {} public class TestObject : INumber1, INumber2 {} public static class TestClass { public static void TestMethod(INumber1&INumber2 testobject) { ... } ...
I have field X of type ILIST <ITopics> I am trying to do this: Object.X= AListOfSometypeThatInheretsITopics; How do I properly cast the list to the Object.X? ...