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Can a class have multiple interfaces Java?
In interfaces, a class can implement more than one interface which can’t be done through extends keyword. Please refer Multiple inheritance in java for more.
Can two interfaces have same method?
Interfaces can now contain methods with implementations. So, if the class already has the same method as an Interface, then the default method from the implemented Interface does not take effect. However, if two interfaces implement the same default method, then there is a conflict.
How is an interface different from a class?
Like a class, an interface defines methods. Unlike a class, an interface never implements methods; instead, classes that implement the interface implement the methods defined by the interface. A class can implement multiple interfaces. The bicycle class and its class hierarchy define what a bicycle can and cannot do in terms of its “bicycleness.”
What should the name of an interface be?
The name of an interface must be a valid C# identifier name. By convention, interface names begin with a capital I. Any class or struct that implements the IEquatable interface must contain a definition for an Equals method that matches the signature that the interface specifies.
Which is an example of a multiple interface in Java?
Now, lets understand multiple interface in java by example. In below program example, there are two interfaces Flyable and Eatable. Flyable interface contains a method fly () and Eatable interface contains a method eat (). Both the methods are unimplemented.
When does multiple inheritance by interface occur in Java?
An interface contains variables and methods like a class but the methods in an interface are abstract by default unlike a class. Multiple inheritance by interface occurs if a class implements multiple interfaces or also if an interface itself extends multiple interfaces.