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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
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
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
How can I define an interface for an array of objects? OP asked for interface, I assume it is extended with other properties and methods, you cannot do that with a type and also type is more limited than an interfaces in terms of general usability
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
inheritance - What is an interface in Java? - Stack Overflow An interface in java is a special type of Abstract class, the Interface provided the 100% Abstraction but since the java introduce new features in java 8 the meaning of whole Interface is change
Should one interface inherit another interface - Stack Overflow Interface inheritance is an excellent tool, though you should only use it when interface B is truly substitutable for interface A, not just to aggregate loosely-related behaviors It's difficult to tell whether it is appropriate for your specific case, but there's nothing wrong using the practice in principle You see it in the first-rate APIs all the time To pick just one common example
How to implement a property in an interface - Stack Overflow In the interface, there is no code You just specify that there is a property with a getter and a setter, whatever they will do In the class, you actually implement them The shortest way to do this is using this { get; set; } syntax The compiler will create a field and generate the getter and setter implementation for it
Why are interface variables static and final by default? 49 Since interface doesn't have a direct object, the only way to access them is by using a class interface and hence that is why if interface variable exists, it should be static otherwise it wont be accessible at all to outside world