🚀 go-pugleaf

Hi Pete...

In the sense that you cannot inherit from more than one base class
Java does not support MI, *however* it does support the implementation
of interfaces which provides the assets of MI without the headaches.
A simple way to think of it is that the benefits are achieved thru 
casting objects to interface type or testing against it.

For example if you have a class A that extends B and implements X
it can be treated in comparisons as B or X like this:

if (A instanceof X) would return true.
if (A instanceof B) would also return true.

Further you can have a method, myMethod, that "returned" an interface
type, like this:

public X myMethod() {
  return new A();
}

You can the test against, say, type B or type X:

if (myMethod() instanceof B) would return true.
if (myMethod() instanceof X) would also return true.

Keep in mind that this is intended to be a simplified overview of the
idea of how to use interfaces, and not a formalized description of how
it should be done.

-Matt



Pete Blacker wrote:
> 
> Hi
> 
> I've done some simple Applet programing in Java, and I've decided to
> start doing some serious work now. I haven't found any comprehensive
> information on OOP in java anywhere. So I still have a very simple
> question unanswered. Does Java support multiple inheritance, if so I
> could use a quick trivial example. I'm not new to OOP but I am new to
> java.
> Thanks for you help, in advance.
> 
> Pete Blacker

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