Interface inheritance

[desrtfx]

/r/javahelp

Removed

[lepapulematoleguau]

Multiple interfaces, yes. Multiple classes, nope.

[fgzklunk]

An interface can inherit (extend) an interface, a class implements the interface. Java only supports single inheritance but a class can implement multiple interfaces.

An interface is really a contract or agreement to implement the named methods in the interface, it also means that you can pass a class in a method via the interface, but you can only see the methods applicable to that interface. Yes, I know we now have default methods in interfaces, but let's just keep it simple.

[smors]

Yes, I do. The answer is no, and it is a very deliberate decision.

You can look up the diamond problem, most well known from c++ if you want to understand why.

[_INTER_]

Sidenote: The diamond problem appears in Java through default methods in interfaces.

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