Урок 6. Коллекции часть 2. Телефонный справочник и массив со словами #4
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| s = phoneBook.get(lastname); | ||
| if (s == null){ | ||
| s = new HashSet<>(); | ||
| } |
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Строки 12-16 можно заменить на:
HashSet s = phoneBook.getOrDefault(lasname, new HashSet<>());
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