❓ Что такое класс

Библиотека собеса по Java | вопросы с собеседований

❓ Что такое класс, объект и интерфейс?

▪️ Класс — это шаблон (схема), описывающий свойства (поля) и поведение (методы) объектов. Например, Car — класс, описывающий машину.
▪️ Объект — это экземпляр класса, созданный в памяти с помощью оператора new. У него есть конкретные значения свойств. Например, Car myCar = new Car(123, "Red"); — конкретный объект машины с конкретными свойствами.
▪️Интерфейс — это контракт, задающий, какие методы должен реализовать класс, если он этот интерфейс имплементирует. Например, List — интерфейс, а ArrayList — класс, который его реализует.

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Create: 2025-02-18
Last Update: 2025-06-20 19:53:06

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