Difference between interface and abstract interface in java [closed]

Question

Like the title says. What is the difference between an interface and an abstract interface in Java?

Answer 1

There is no such thing as abstract interface in Java (as interface is abstract by default), there is Abstract class.

The main difference between an abstract class and an interface, is that abstract class is inherited (extended), as normal class, so you cannot extend two of them in parallel, while you can implement more than one interface at the same time.

Answer 2

The abstract keyword is obsolete when working with Java interfaces, as a java interface by definition is abstract; it contains no implementation but only definitions.