April 2018
Intermediate to advanced
264 pages
8h 24m
Polish
Content preview from Nowoczesne receptury w Javie
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Rozdział 8. Pakiet java.time
Przyjaciel nie pozwala przyjacielowi używać klasy java.util.Date.
— Tim Yates
Od samego początku istnienia Javy biblioteka edycji standardowej zawiera dwie klasy do pracy z datami i godzinami: java.util.Date i java.util.Calendar. Pierwsza z nich jest klasycznym przykładem tego, jak nie należy projektować klas. Jeśli zajrzysz do jej publicznego API, odkryjesz, że prawie wszystkie metody są wycofywane, i to już od Javy 1.1 (mniej więcej od 1997 roku). Zamiast nich zalecane jest używanie składowych klasy Calendar, która jest niewiele lepsza.
Obie te klasy powstały przed dodaniem do języka wyliczeń, dlatego do oznaczania takich pól jak na przykład miesiące używają stałych całkowitoliczbowych. Obie dopuszczają możliwość ...
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