问题

让我们假设我在Java中有一个Car类，然后我创建另一个名为ElectricCar的类。在我的ElectricCar类中，可以将Car对象作为状态变量吗？

英文:

Let's say I have a Car class in Java and then I make another class called ElectricCar. Can a Car object be a state variable in my ElectricCar class?

答案1

得分: 2

简而言之：是的。试试看：

    class Car {
    }

    class ElectricCar {
        Car myCar = new Car();
    }

英文:

Simply put: yes. Try it:

class Car {
}

class ElectricCar {
    Car myCar = new Car();
}

得分: 1

是的，这很常见：

class Car {
}

class ElectricCar {
    private final Car car;

    ElectricCar(Car car) {
        this.car = car;
    }
}

英文:

Yes; and it's quite common:

class Car {
}

class ElectricCar {
    private final Car car;

    ElectricCar(Car car) {
        this.car = car;
    }

}

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