Java #19 - Interfaces

Describes how Java interfaces work, particularly the "Comparable" Interface

Category:

Education

Tags:

• Java
• interface
• Comparable

[geraldnlang]

for a card game, would you use an interface or an abstract class? :|

[carlislemc]

@geraldnlang You use an abstract class when you want to create a bunch of common methods/attributes that will be inherited (reused). Interfaces are useful when you have a collection of classes that must implement the same methods, but there won't be reuse.

[itsmancini]

at 1:20, how did you pass car1 to the method travel, before you casted car1 to vehicle? If travel takes a vechicle parameter, shouldnt you have to cast car to vehicle first?

[carlislemc]

Since the class Car implements the interface Vehicle, you can pass it to travel (which requires a Vehicle) without having to do a typecast.

[shadowlizzard]

at 0:59, he meant to say the interface Vehicle, right?

[carlislemc]

Yes, I did mean "interface Vehicle". Sorry about that!

[tomhsharky]

Very clear, well taught. Thanks!

[gatoo23]

Thank you very much. :)

[pavichokche]

Good video, pretty informative :D

[dewi20]

thanks very much

more videos on java please?

Could you do one on casting objects?

I don't understand that fully

I know it takes loads of time to make these videos, but it's worth asking :P

[emeraldmorn]

Excellent video!!! now I can get program for Java Prog. II done! lol

[Durthalion]

Thanks that was very helpful