package p; | |
import java.util.ArrayList; | |
import java.util.List; | |
interface I { | |
public List<String> getList(); | |
} | |
class A implements I { | |
public List<String> getList() { | |
List<String> list= new ArrayList<String>(); | |
list.add("X"); | |
return list; | |
} | |
} | |
class B extends A { | |
public List<String> getList() { | |
return null; | |
} | |
} |