Re: Doubt on Generics and Interfaces

Hello. I have implemented an interface "ComboItem" and a class
implementing this interface, named "PortadorDireito". This class
"PortadorDireito" is abstract and is extended by the class
"Operador".

In another class, I have a method that receives a list of ComboItem,
like this:

import java.util.List;

class TesteAction {

   public void teste (String x, String y, List<ComboItem> options,
ComboItem default) {
   ...
   }

}

Then, when using this method TesteAction.teste(), I am passing a
List<Operador> as parameter, like this:

testeAction x = new TesteAction();
x.teste(String a, String b, List<Operador> c, Operador d)

The compiler is not accepting, so I must have done something wrong
with generics, or forgot to implement something. Do you have hints on
what I am doing wrong?

also the following gives error also, but different:

x.teste(String a, String b, List<Operador> c, null)

Below follow the error for the first case:

Caused by: java.lang.Error: Unresolved compilation problem:
    The method adicionarFiltroCombo(String, String, List, ComboItem,
String, boolean) in the type RelatorioAction is not applicable for the
arguments (String, String, List, Operador, String, boolean)

and for the second case:

Caused by: java.lang.Error: Unresolved compilation problem:
    The method adicionarFiltroCombo(String, String, List, ComboItem,
String, boolean) in the type RelatorioAction is not applicable for the
arguments (String, String, List, null, String, boolean)

Thank you.