Interface Implementation in Class Hierarchies

Write a Java program to demonstrate interface implementation in a class hierarchy

The Vehicle interface defines a method start() which represents the action of starting a vehicle.
The Car and Motorcycle classes implement the Vehicle interface, providing their own implementations of the start() method.
In the Main class, instances of Car and Motorcycle are created and assigned to variables of type Vehicle.
The start() method is then called on these instances, which invokes the appropriate implementation based on the actual type of the object (polymorphism).

Source Code

interface Vehicle
{
	void start();
}
 
class Car implements Vehicle
{
	@Override
	public void start()
	{
		System.out.println("Car is starting");
	}
}
 
class Motorcycle implements Vehicle
{
	@Override
	public void start()
	{
		System.out.println("Motorcycle is starting");
	}
}
 
public class Main
{
	public static void main(String[] args)
	{
		Vehicle car = new Car();
		Vehicle motorcycle = new Motorcycle();
 
		car.start();
		motorcycle.start();
	}
}

Output

Car is starting
Motorcycle is starting

Interface Implementation in Class Hierarchies

Source Code

Output

Example Programs

Interface Programs in Java