Create a class Airplane, which implements a Flyable interface that has two methods takeOff() and land().

Here's an example implementation of the Airplane class that implements the Flyable interface:

public class Airplane implements Flyable {
    @Override
    public void takeOff() {
        // implementation for take off
        System.out.println("Airplane is taking off.");
    }

    @Override
    public void land() {
        // implementation for landing
        System.out.println("Airplane is landing.");
    }
}

In this implementation, the Airplane class provides its own implementation of the takeOff() and land() methods that were defined in the Flyable interface. These methods can be customized to suit the specific needs of the Airplane class.

相关问题

Add a Test class with a method makeItTakeOff(Flyable f) that makes the flyable object f take off.

Here's an example implementation of the Test class with the makeItTakeOff() method that takes a Flyable object and makes it take off:

public class Test {
    public static void makeItTakeOff(Flyable f) {
        f.takeOff();
    }
}

In this implementation, the makeItTakeOff() method takes a Flyable object as a parameter and calls its takeOff() method to make it take off. This method can be used to test and demonstrate the functionality of any Flyable object, including the Airplane and Bat objects we defined earlier. For example, we could call the method as follows:

Airplane airplane = new Airplane();
Bat bat = new Bat();

Test.makeItTakeOff(airplane); // prints "Airplane is taking off."
Test.makeItTakeOff(bat); // prints "Bat is taking off by flying."

In this example, we create an Airplane object and a Bat object, and call the makeItTakeOff() method with each of them. The method correctly calls the takeOff() method for each object, and prints the appropriate message indicating that the object is taking off.

at Plane1.Airplane.add(Airplane.java:90)有什么错误

根据你提供的信息，从错误信息来看，出现了一个错误，发生在Plane1.Airplane类的Airplane.java文件的第90行。由于你没有提供具体的错误信息，我无法确定具体的错误类型。但是通常情况下，这可能是由于某个变量的使用方式不正确、方法调用错误或者空指针引发的错误。你可以检查一下Airplane.java文件的第90行，看看是否有任何可能引起错误的代码。确保你在使用变量之前已经对其进行了初始化，并且检查方法调用是否正确。如果你能提供更多的错误信息，我可以给出更具体的帮助。