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Can we implement multiple interfaces with same method in Java?
If two interfaces contain a method with the same signature but different return types, then it is impossible to implement both the interface simultaneously. It is a compile-time error to declare two methods with override-equivalent signatures in a class.
Can a concrete class implement multiple interfaces?
A concrete class can implement multiple interfaces, but can only inherit from one parent class. In the example below, the Dog class inherits its methods from the interface, Pet , and the abstract class, Animal . Another example of a concrete class is an ArrayList in Java.
How do you implement multiple interfaces in C++?
I have the interface hierarchy as follows: class A { public: void foo() = 0; }; class B: public A { public: void testB() = 0; }; class C: public A { public: void testC() = 0; };
What is the difference between multiple and multilevel inheritance in C++?
The key difference between Multiple and Multilevel Inheritance is that Multiple Inheritance is when a class inherits from many base classes while Multilevel Inheritance is when a class inherits from a derived class making that derived class a base class for a new class.
How to implement multiple interfaces having the same method name?
The implementation of interface’s members will be given by the class who implements the interface implicitly or explicitly. C# allows the implementation of multiple interfaces with the same method name. To understand how to implement multiple interfaces with the same method name we take an example.
How is an interface similar to a class?
Like a class, Interface can have methods, properties, events, and indexers as its members. But interface will contain only the declaration of the members. The implementation of interface’s members will be given by the class who implements the interface implicitly or explicitly.
How is an interface implemented in C #?
Also, we will cover how this can be helpful in implementing the SOLID principles. An interface in C# is a type which only defines a group of related functionalities and leaves the implementation of the functionalities to any class or struct which implements the interface.
What happens if two methods have the same implementation in Java?
As far as the compiler is concerned, those two methods are identical. There will be one implementation of both. This isn’t a problem if the two methods are effectively identical, in that they should have the same implementation. If they are contractually different (as per the documentation for each interface), you’ll be in trouble.