Interface with default methods in java 8in later version of java interfaces always contained only method declaration. we are not giving method definition in the interfaces because java did not allow ...

When default methods were introduced in Java 8, some developers thought they would be the same as abstract classes. That’s not true, however, because interfaces can’t have state.

Functional interfaces are new additions in java 8 which permit exactly one abstract method inside them. These interfaces are also called Single Abstract Method interfaces (SAM ...

An abstract class in Java is a class that cannot be instantiated and is used as a base for other classes. It can include both abstract methods (without an implementation) and concrete methods (with an ...