What is an interface in java?

Answer 1

Interfaces are quite advanced stuff. I don't know much about it, I only know that it's an abstract class with abstract methods in it. Sorry. It's explained in the Java Course, in "More on classes" chapter.

Answer 2

hehehe..np @Baptiste

Answer 3

The interface in java is a mechanism to achieve abstraction. There can be only abstract methods in the java interface not method body. It is used to achieve abstraction and multiple inheritance in Java.

Answer 4

interface is same like but u can only declare the method within interface,,though after java8 u can define also...u have to implement ur method in a class

Answer 5

Interfaces are purely abstract. You can't define a constructor within that. Interfaces are mainly used for coupling stuffs. For loose coupling, interfaces are used.