Question

I have a SomeClass implements InterfaceA.
I have a method:

public void doSomething(List<SomeClass) objects); 

Inside this method I want to call:

public void doProcessing(List<InterfaceA) o); 

How can I do it?
The following does not work although SomeClass isa InterfaceA:

public void doSomething(List<SomeClass> objects){  

   doProcessing(objects);  

}

What is the standard way to handle this?

Answer 1

public void doSomething(List<? extends InterfaceA> objects) 

should work.

Read http://java.sun.com/j2se/1.5/pdf/generics-tutorial.pdf , at least twice.