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- What is the difference between an interface and abstract class?
An interface is a good example of loose coupling (dynamic polymorphism dynamic binding) An interface implements polymorphism and abstraction It tells what to do but how to do is defined by the implementing class
- oop - What is the definition of interface in object oriented . . .
An interface promises nothing about an action! The source of the confusion is that in most languages, if you have an interface type that defines a set of methods, the class that implements it "repeats" the same methods (but provides definition), so the interface looks like a skeleton or an outline of the class
- Whats the difference between interface and @interface in java?
42 The interface keyword indicates that you are declaring a traditional interface class in Java The @interface keyword is used to declare a new annotation type See docs oracle tutorial on annotations for a description of the syntax See the JLS if you really want to get into the details of what @interface means
- oop - When to use an interface instead of an abstract class and vice . . .
An Interface is more of a high level architectural tool (which becomes clearer if you start to grasp design patterns) - an Abstract has a foot in both camps and can perform some of the dirty work too Why use one over the other? The former allows for a more concrete definition of descendants - the latter allows for greater polymorphism
- java - Can a normal Class implement multiple interfaces . . . - Stack . . .
168 A Java class can only extend one parent class Multiple inheritance (extends) is not allowed Interfaces are not classes, however, and a class can implement more than one interface The parent interfaces are declared in a comma-separated list, after the implements keyword In conclusion, yes, it is possible to do: public class A implements
- Interface defining a constructor signature? - Stack Overflow
An interface can indeed not be instantiated so doesn't need a constructor What I wanted to define was a signature to a constructor Exactly like an interface can define a signature of a certain method, the interface could define the signature of a constructor
- Interface type check with Typescript - Stack Overflow
This question is the direct analogon to Class type check in TypeScript I need to find out at runtime if a variable of type any implements an interface Here's my code: interface A { member: str
- How can I make a method private in an interface?
Here is the link to the docs Since private interface members won't be accessible in an implementing class you'll have to provide a default implementation for such member, otherwise such code won't compile A real use case for such method may be a refactoring of another default method in an interface
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