Java Interface: Implement the Flyable interface

Last update on April 28 2025 07:55:41 (UTC/GMT +8 hours)

Write a Java program to create an interface Flyable with a method called fly_obj(). Create three classes Spacecraft, Airplane, and Helicopter that implement the Flyable interface. Implement the fly_obj() method for each of the three classes.

Sample Solution:

Java Code:

// Flyable.java
// Interface Flyable

// Declare the Flyable interface
interface Flyable {
    // Declare the abstract method "fly_obj" that classes implementing this interface must provide
    void fly_obj();
}

// Spacecraft.java
// Class Spacecraft

// Declare the Spacecraft class, which implements the Flyable interface
class Spacecraft implements Flyable {
    // Implement the "fly_obj" method required by the Flyable interface
    @Override
    public void fly_obj() {
        // Print a message indicating that the Spacecraft is flying
        System.out.println("Spacecraft is flying");
    }
}

// Airplane.java
// Class Airplane

// Declare the Airplane class, which implements the Flyable interface
class Airplane implements Flyable {
    // Implement the "fly_obj" method required by the Flyable interface
    @Override
    public void fly_obj() {
        // Print a message indicating that the Airplane is flying
        System.out.println("Airplane is flying");
    }
}

// Helicopter.java
// Class Helicopter

// Declare the Helicopter class, which implements the Flyable interface
class Helicopter implements Flyable {
    // Implement the "fly_obj" method required by the Flyable interface
    @Override
    public void fly_obj() {
        // Print a message indicating that the Helicopter is flying
        System.out.println("Helicopter is flying");
    }
}

// Main.java
// Class Main

// Declare the Main class
public class Main {
    public static void main(String[] args) {
        // Create an array of Flyable objects, including a Spacecraft, Airplane, and Helicopter
        Flyable[] flyingObjects = {new Spacecraft(), new Airplane(), new Helicopter()};

        // Iterate through the array and call the "fly_obj" method on each object
        for (Flyable obj : flyingObjects) {
            obj.fly_obj();
        }
    }
}

Sample Output:

Spacecraft is flying
Airplane is flying
Helicopter is flying

Flowchart of Interface Flyable:

Flowchart of Class Spacecraft:

Flowchart of Class Airplane:

Flowchart of Class Helicopter:

Flowchart of Class Main:

For more Practice: Solve these Related Problems:

• Write a Java program to extend the Flyable interface to include a land() method, then implement it in Spacecraft, Airplane, and Helicopter classes.
• Write a Java program to create an abstract class AirVehicle that implements Flyable and provides additional flight-related methods, then extend it in subclasses.
• Write a Java program to simulate flight dynamics by implementing Flyable with methods fly(), takeOff(), and land() in various vehicle classes.
• Write a Java program to use lambda expressions with the Flyable interface to dynamically simulate flight behavior for different objects.

Java Code Editor:

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