In this basic example
String str = "hola";
Object o;
o = str; // it's OK
List<String> listado = new ArrayList<String>();
List<Object> listResult;
listResult = listado; // it's WRONG
why the cast to the superclass works in the first case but doesn't work when working with Lists? (It gives a Type mismatch: cannot convert from List< String> to List< Object>)
