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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
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
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 should one use interfaces? - Stack Overflow I know that an interface does not have a body, just a method definition But when should I use interfaces? If I provide someone a set of interfaces with no body, why would they feel a need to write
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 why interface extends interface - Stack Overflow I am wondering under what circumstances do we extend an interface from an interface? Because, for example interface A{ public void method1(); } interface B extends A{ public void method2(
What happens when we create an object of interface? Interface is that, just an interface You can not instantiate an interface You can use it as a variable which points to a class which implements that interface Interface is a public collection of methods properties with a guarantee that all of its methods are implemented Abstract classes are similar to interfaces but it does not provide such guarantee In OOP, this is a kind of polymorphism