Co se tyce toho, zda tuto anotaci pouzivat, tak jsem nekde cetl a
souhlasim s tim, ze je dobre ji pouzivat. Tato anotace vam zajisti
kontrolu nad tim, zda dana metoda opravdu prekryva metodu predka. U
implementace rozhrani to neni az tak dulezite, jelikoz v pripade zmeny
rozhrani vam kompilator vyhodi chybu tak jako tak, ze metoda neni
implementovana. Jina situace je ale v pripade, ze prekryvame metodu od
predka a pocitame s tim, ze se bude volat ta prekryta metoda. v pripade,
ze dojde ke zmene v implementaci u potomka (prida se parametr, zmeni se
typ parametru) tak se nemusi tato zmena projevit jako chyba v okoli
daneho objektu, ktere jej vyuziva, ale fakticky to bude delat neco
jineho, nez se puvodne predpokladalo (bude se volat metoda predka a ne
ta prekryta). Tato anotace nam zajisti vyhozeni chyby, ze metoda jiz
neni prepisem jine metody, ale ze mame dve samostatne metody.
Jaroslav Hurdes
Dne 8.3.2010 16:27, Marian Stevlik napsal(a):
Hi all,
Chcel by som sa spytat, ci sa ma uvadzat anotacia @Override nad
implementaciou metody interfaceu?
Ide o Javu 1.6
Priklad:
public interface NejakyInterface {
public void nejakaMetoda();
}
public class NejakyInterfaceImpl implements NejakyInterface {
@Override // Anotacia ano ci nie?
public void nejakaMetoda() {
// nejaky kod
}
}
Pytam sa preto, bo NetBeans 6.8 mi davaju warning, ze by tam anotacia
mala byt, ale Eclipse Galileo mi tam potom hadzu chybu a odporucaju
anotaciu vymazat.
Michal
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