Point of java interfaces?

[Mala]

In my computer programming course we are currently doing abstract classes / java interfaces. I don't quite understand the point of an interface, since its just a bunch of blank method names, is the only point of it so you don't forget to include a certain method in the main code?

[Khamsin]

In my computer programming course we are currently doing abstract classes / java interfaces. I don't quite understand the point of an interface, since its just a bunch of blank method names, is the only point of it so you don't forget to include a certain method in the main code?

Blank method names are sorta like function declarations in C++. You do it so Java knows what to expect later. In terms of abstract classes in general, empty methods are there so classes you make that inherit (or implement) that class knows what methods are supposed to be in it. You can define the code for the function in your non-abstract class that implements the abstract one, and any further inheritance after that can either leave the code the same as its parent, or redefine it.

[Mala]

Thank you.