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2. java - Attributes / member variables in interfaces? - Stack...

   stackoverflow.com/questions/7311274

   An interface has no state."; an interface has no state, but as far as an interface is concerned, public member variables are part of the object's public API. Unfortunately in Java-land, a public member variable is specifying something about the implementation of that API (namely that it's an in-memory variable) rather than leaving yourself the ...

3. What's the difference between interface and @interface in java?

   stackoverflow.com/questions/918393

   interface in the Java programming language is an abstract type that is used to specify a behavior that classes must implement. They are similar to protocols. Interfaces are declared using the interface keyword. @interface is used to create your own (custom) Java annotations. Annotations are defined in their own file, just like a Java class or ...

4. Why do we need interfaces in Java? - Stack Overflow

   stackoverflow.com/questions/3528420

   Interface defines a set of common behaviors. The classes implement the interface agree to these behaviors and provide their own implementation to the behaviors. This allows you to program at the interface, instead of the actual implementation. One of the main usage of interface is provide a communication contract between two objects.

5. inheritance - What is an interface in Java? - Stack Overflow

   stackoverflow.com/questions/1321122

   An interface in java is a blueprint of a class. It has static constants and abstract methods only.The interface in java is a mechanism to achieve fully abstraction. There can be only abstract methods in the java interface not method body. It is used to achieve fully abstraction and multiple inheritance in Java.

6. java - How to use generics with interfaces - Stack Overflow

   stackoverflow.com/questions/65749658

   This is not really a question about how the Consumer - or other interfaces - in Java work, but about Generics. Generics aim to simplify the way of writing code and avoid code repetitions. E.g. you need to do a similar task, but for different types you can write it once by using Generics instead of writing it over and over again, just with ...

7. java - Fields in interfaces - Stack Overflow

   stackoverflow.com/questions/9446893

   @MuhammedOzdogan , you can see item 22: "Use interfaces only to define types" of "Effective Java" : "The constant interface pattern is a poor use of interfaces. That a class uses some constants internally is an implementation detail. Implementing a constant interface causes this implementation detail to leak into the class’s exported API." –

8. How to create variables in java interfaces - Stack Overflow

   stackoverflow.com/questions/33766579

   The whole point of interfaces is to specify as interface - i.e. how will your classes interface with client classes. Instance variables are clearly not part of any interface at all. Instead, try this: public interface DefenseBuilding { public void shoot (); } and this:

9. java - Constructor in an Interface? - Stack Overflow

   stackoverflow.com/questions/2804041

   Java interface type as constructor parameters. 1. Interfaces, classes and constructors in java. 0. one ...

10. Java Interfaces/Implementation naming convention - Stack Overflow

    stackoverflow.com/questions/2814805

    An Interface in Java is a Type. Then you have DumpTruck, TransferTruck, WreckerTruck, CementTruck, etc that implements Truck. When you are using the Interface in place of a sub-class you just cast it to Truck. As in List<Truck>. Putting I in front is just Systems Hungarian style notation tautology that adds nothing but more stuff to type to ...

11. Interface naming in Java - Stack Overflow

    stackoverflow.com/questions/541912

    Because of that, I don't think conventions are nearly as important in java for interfaces, since there is an explicit difference between inheritance and interface implementation. I would say just choose any naming convention you would like, as long as you are consistant and use something to show people that these are interfaces.