Interfaces and methods with complex object

Question

In all the examples I have, the methods of an interface use only basic java datatypes (int, Character, ..)
I want to pass a Vector that represents a list of objects from one of my own classes to an interface method.
class Myclass ...
private String p1;
private int p2;
myInterfaceMethod(..., Vector list, ...)
// list is a vector of Myclass objects
How do I know about Myclass when implementing the interface and how do I access p1 and p2 ?

Answer 1

You can use any kind of "complex" object in your interface methods, all of them are objects at last.
The other question seems to be a misunderstanding of interface implementation. When u "implement" an interface in a class, all that JVM does is to check that you actualy have one method (with code inside its body) for each method you defined previously in the interface.
Think of an interface as a contract signed by a class. It's forced to implement each method definied in you interface. So, as the method is defined inside the class, you can access any data member of the class without doing anything "special". Do u catch it?