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/usr/home/rafos/domains/javaczyherbata.pl/public_html/wp-content/plugins/crayon-syntax-highlighter/crayon_langs.class.php on line 340 Warning: preg_replace(): Compilation failed: invalid range in character class at offset 4 in /usr/home/rafos/domains/javaczyherbata.pl/public_html/wp-content/plugins/crayon-syntax-highlighter/crayon_langs.class.php on line 340 Warning: preg_replace(): Compilation failed: invalid range in character class at offset 4 in /usr/home/rafos/domains/javaczyherbata.pl/public_html/wp-content/plugins/crayon-syntax-highlighter/crayon_langs.class.php on line 340 Krótka historia czasu – Tomasz Nurkiewicz

Krótka historia czasu – Tomasz Nurkiewicz

Tomasz Nurkiewicz, niczym Stephen Hawking, opowiada o pułapkach związanych z datami i czasem w Javie (oraz ogólnie w informatyce). Byłem, widziałem – najlepsza prezentacja na tegorocznej Confiturze!

Od autora:
Jaka jest różnica czasu między Warszawą a Sydney? Odpowiedź na to pytanie jest zaskakująco trudna. Równie zaskakującym jest jak wielu programistów tej trudności nie dostrzega. Niby po co? Bo niemal co roku na światło dziennie wypływają zawstydzające błędy w oprogramowaniu, wynikające z niewiedzy bądź lekkomyślnego traktowania… czasu w systemach komputerowych.

Podczas tej prezentacji spróbuję pokazać, jak ważne jest świadome operowanie czasem podczas pisania oprogramowania. Nie będziemy (prawie) narzekali na klasę java.util.Date, ale skupimy się na fundamentalnych nieporozumieniach i błędach. Zobaczymy w przykładach fatalne skutki beztroskiego i nieumiejętnego obchodzenia się z czasem.

Nauczymy się także jak przechowywać, przesyłać i przetwarzać czas oraz jak testować systemy zależne od czasu (czyli w zasadzie wszystkie). Nie spodziewajcie się eksploracji takiego czy innego API. Skupimy się raczej na zrozumieniu praw rządzących upływem czasu i ich odpowiednim modelowaniem w naszych programach.

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