Answer: If we have two interface with same method name then a class need to implement interface explicitly in a program. Also note that when we use explicit interface implementations, the functions are not public in the class. In below C# program example, we have two interfaces ILoanCustomer and IBankCustomer.
Full Answer
How to identify if two interfaces have the same method?
There is nothing to identify. Interfaces only proscribe a method name and signature. If both interfaces have a method of exactly the same name and signature, the implementing class can implement both interface methods with a single concrete method.
Can the same method be inherited from multiple interfaces at once?
There might be several paths by which the same method declaration might be inherited from an interface. This fact causes no difficulty and never, of itself, results in a compile-time error.
Is it a bad idea to implement two interfaces at once?
The same can hold for the methods: if keeping one contract would mean breaking the other then it's in fact a bad idea to implement both interfaces. Edit :Contract broken, As per Class C signature It should implement two methods,but ultimately its implementing only one method and omitting another.
Can a class implement more than one interface in 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. Now, Suppose we have a class that implements both those interfaces:
CAN 2 interfaces have same methods?
No, its an error If two interfaces contain a method with the same signature but different return types, then it is impossible to implement both the interface simultaneously. According to JLS (§8.4. 2) methods with same signature is not allowed in this case.
What happens when two interfaces have same method?
A class implementation of a method takes precedence over a default method. 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.
What happens when a class implements two interfaces and both have a method with same name and signature?
If a type implements two interfaces, and each interface define a method that has identical signature, then in effect there is only one method, and they are not distinguishable.
Can I implement 2 interfaces having same method in a single class 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. According to JLS (§8.4. 2) methods with same signature is not allowed in this case.
What happens when we access the same variable defined in two interfaces implemented by the same class?
What happens when we access the same variable defined in two interfaces implemented by the same class? Explanation: The JVM needs to distinctly know which value of variable it needs to use. To avoid confusion to the JVM interfaceName. variableName is mandatory.
Can we have more than 1 default interface?
Multiple Defaults With default functions in interfaces, there is a possibility that a class is implementing two interfaces with same default methods. The following code explains how this ambiguity can be resolved. First solution is to create an own method that overrides the default implementation.
Can two interfaces have same method C#?
C# allows the implementation of multiple interfaces with the same method name.
What will happen if a class extends two interfaces and both have a method?
What would be the result if a class extends two interfaces and both have a method with same name and signature? Lets assume that the class is not implementing that method. Explanation: In case of such conflict, compiler will not be able to link a method call due to ambiguity. It will throw compile time error.
Can I write another method inside a default method?
Is there some possibility to this. just define a default implementation for getRevision directly, you can't implement a method in a method. INNER are for class implementation, not methods.
Can a class implement 2 interfaces?
Your class can implement more than one interface, so the implements keyword is followed by a comma-separated list of the interfaces implemented by the class. By convention, the implements clause follows the extends clause, if there is one.
Can we define method in interface?
It cannot have a method body. Java Interface also represents the IS-A relationship. Like a class, an interface can have methods and variables, but the methods declared in an interface are by default abstract (only method signature, no body). Interfaces specify what a class must do and not how.
Can interface methods have return type in Java?
Generic Interfaces This interface represents an interface which contains a single method called produce() which can produce a single object. Since the return value of produce() is Object , it can return any Java object.
What is Interface?
Interfaces in C# are provided as a replacement of multiple inheritance. Interface contains all abstract methods inherited by classes and structs, which must provide an implementation for each interface member declared. The keyword interface creates an interface. They are public by default.
Creating Interface with the Same Method Name
Now we create interfaces named A and B. The A and B interfaces contain functions with the same name, Hello ().
