Implement interface

[Tony Johansson]

Hello!

When a class implaments an Interface must the class implement all methods?
Whan happen if the class don't implament all methods in the interface. Will
it cause compile error then.

//Tony

[Murray]

Re: Implement interface


"Tony Johansson" <johansson.ande rsson@telia.com > wrote in message
news:4Eome.1387 57$dP1.488907@n ewsc.telia.net. ..[color=blue]
> Hello!
>
> When a class implaments an Interface must the class implement all methods?
> Whan happen if the class don't implament all methods in the interface.[/color]
Will[color=blue]
> it cause compile error then.
>
> //Tony[/color]

Why don't you try it and find out yourself?

A class must implement all methods of the interface, unless the class is
declared as abstract.

[James McIninch]

Re: Implement interface

<posted & mailed>

Tony Johansson wrote:
[color=blue]
> Hello!
>
> When a class implaments an Interface must the class implement all methods?[/color]

Yes, that's the idea.

[color=blue]
> Whan happen if the class don't implament all methods in the interface.
> Will it cause compile error then.[/color]

It doesn't compile.
[color=blue]
>
> //Tony[/color]

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[Gordon Beaton]

Re: Implement interface

On Sun, 29 May 2005 19:22:40 GMT, Tony Johansson wrote:[color=blue]
> When a class implaments an Interface must the class implement all
> methods? Whan happen if the class don't implament all methods in the
> interface.[/color]

You have two choices:

- implement every method required by the interface

or

- declare the missing methods abstract in your class. This forces you
to declare your class abstract and, as a result, forces you to
subclass the class (and implement the missing methods) before you
can create any objects.
[color=blue]
> Will it cause compile error then.[/color]

Otherwise, yes.

/gordon

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