Implementing two interfaces in a class with same method. Which interface method is overridden?

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. If, say, the two methods have conflicting return types, then it will be a compilation error. This is the general rule of inheritance, method overriding, hiding, … Read more

How to use the Implements in Excel VBA

This is an esoteric OOP concept and there’s a little more you need to do and understand to use a custom collection of shapes. You may first want to go through this answer to get a general understanding of classes and interfaces in VBA. Follow the below instructions First open Notepad and copy-paste the below … Read more

What is an interface in Java?

An interface is a special form of an abstract class which does not implement any methods. In Java, you create an interface like this: interface Interface { void interfaceMethod(); } Since the interface can’t implement any methods, it’s implied that the entire thing, including all the methods, are both public and abstract (abstract in Java … Read more

How to create interface between Fragment and adapter?

Make a new constructor and an instance variable: AdapterInterface buttonListener; public MyListAdapter (Context context, Cursor c, int flags, AdapterInterface buttonListener) { super(context,c,flags); this.buttonListener = buttonListener; } When the Adapter is made, the instance variable will be given the proper reference to hold. To call the Fragment from the click: public void onClick(View v) { buttonListener.buttonPressed(); … Read more

Implements vs extends: When to use? What’s the difference?

extends is for extending a class. implements is for implementing an interface The difference between an interface and a regular class is that in an interface you can not implement any of the declared methods. Only the class that “implements” the interface can implement the methods. The C++ equivalent of an interface would be an … Read more

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