fabianoruy wrote:o compilador procura o mais específico (String).
Fabiano B. Ruy

fabianoruy wrote:Acho que imprime o primeiro ("String: null").
Não dá erro pq String é um Object e o compilador procura o mais específico (String).

Só acho que isso não é Polimorfismo, certo?

É apenas sobrecarga de nomes!

There is a rule in the JLS about this. In the case of two or more
possible methods matching, the one that is selected is the one whose
parameter types most closely match the argument types in the method
call. In the case of the argument being null without a typecast, the
method with the most specific parameter types is selected.
In your code, String is more specific than Object, because String is a
subclass of Object. So therefore the compiler chooses printIt(String).
If you had two methods whose parameter types were equally specific,
for example printIt(String) and printIt(List), you would get a compiler
error. Likewise if you had two methods with two parameters, and neither
had both more specific than the other. For example printIt(Object,
String) and printIt(String, Object).

--
/-- Joona Palaste (palaste@cc.helsinki.fi) ------------- Finland --------\
\-- http://www.helsinki.fi/~palaste --------------------- rules! --------/