With inheritance of interface you inherit only the method declarations, not the implementation. So when you inherit interface, your new object exposes all of those methods declared in the subclass ...

Java’s interface language feature confuses many Java newbies. Many mistakenly assume that interfaces only sidestep Java’s failure to support multiple implementation inheritance. In reality ...

The ability to partially implement interfaces, without running the risk of having to cut and paste code in the case where there's a collision in inheritance of interfaces.

I was thinking maybe you could have a language that allowed you to specify multiple inheritable interfaces of classes, but leave the implementation inheritance portion of that up to the programmer.

Practical .NET Leveraging Interfaces Instead of Inheritance If you need to have objects look alike but don't have any code to share, you don't need inheritance -- you need an interface. Here's an ...

Background In literature, one encounters the terms subclassing and implementation inheritance, among others, to refer to the use of inheritance as a means for code reuse. The terms subtyping, ...

A controversial new proposal for .NET suggests the introduction of a limited form of multiple inheritance via abstract interfaces. This feature was inspired by Java’s default methods.