> For the complete documentation index, see [llms.txt](https://comaqa.gitbook.io/java-automation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://comaqa.gitbook.io/java-automation/oop-v-java/interfeisy.md).

# Интерфейсы

Интерфейсы Java созданы для поддержки динамического выбора (resolution) методов во время выполнения программы. Интерфейсы похожи на классы, но могут содержать только константы, сигнатуры методов и вложенные типы. Класс может реализовывать любое количество интерфейсов. Все, что нужно сделать — это реализовать в классе полный набор методов всех интерфейсов. Сигнатуры таких методов класса должны точно совпадать с сигнатурами методов реализуемого в этом классе интерфейса.

Общая форма интерфейса:

```
public interface OperateCar {
    // constant declarations, if any

    // method signatures

    // An enum with values RIGHT, LEFT

}
```

Пример интерфейса:

```
public interface OperateCar {
    int turn(Direction direction, double radius, double startSpeed, double endSpeed);

    int changeLanes(Direction direction, double startSpeed, double endSpeed);

    int signalTurn(Direction direction, boolean signalOn);

    int getRadarFront(double distanceToCar, double speedOfCar);

    int getRadarRear(double distanceToCar, double speedOfCar);
    ......
    // more method signatures
}
```

Реализация интерфейса

```
public class OperateBMW760i implements OperateCar {
    // the OperateCar method signatures, with implementation --
    // for example:
    int signalTurn(Direction direction, boolean signalOn) {
       // code to turn BMW's LEFT turn indicator lights on
       // code to turn BMW's LEFT turn indicator lights off
       // code to turn BMW's RIGHT turn indicator lights on
       // code to turn BMW's RIGHT turn indicator lights off
    }

    // other members, as needed -- for example, helper classes not 
    // visible to clients of the interface
}
```

Задание 1

```
Напишите интерфейс, в котором объявлены сигнатуры методов списка дел по дому.
```


---

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