Java Syntax: difference between abstract interface and Interface

The interface itself is abstract, but there is no clear provision, it is necessary to write the abstract keyword.
Abstract interface is an interface, and there is no difference between the two.
In Java in a nutshell,
"All methods of an interface are implicitly abstract, even if the abstract modifier is omitted ."
In thinking in Java,
"The abstract keyword, which allows you to create one or more methods in a class that have no definitions
-You provide part of the interface without providing a corresponding implementation, which is created by inheritors.
The interface keyword produces a completely abstract class, one that provides no implementation at all."
The conclusion is that abstract interface is an interface, and there is no difference between them.

Post from: http://www.blogjava.net/gembin/archive/2008/03/21/187746.html