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Select the correct answerWhat is the output of the following Java program?public class Vehicle { public void move() { System.out.println("The vehicle moves"); }}public class Car extends Vehicle { public void move() { System.out.println("The car moves"); }}public class Main { public static void main(String[] args) { Vehicle vehicle = new Car(); vehicle.move(); }}Options"The car moves""The vehicle moves"The code does not compileNone of these

Question

Select the correct answerWhat is the output of the following Java program?public class Vehicle { public void move() { System.out.println("The vehicle moves"); }}public class Car extends Vehicle { public void move() { System.out.println("The car moves"); }}public class Main { public static void main(String[] args) { Vehicle vehicle = new Car(); vehicle.move(); }}Options"The car moves""The vehicle moves"The code does not compileNone of these

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Solution

The correct answer is "The car moves".

Here's the step-by-step explanation:

  1. The Vehicle class has a method called move() that prints out "The vehicle moves".

  2. The Car class extends Vehicle, meaning it inherits all of its methods. However, it also has its own move() method that prints out "The car moves". This is an example of method overriding in Java.

  3. In the main method, a Vehicle object is created but it's actually a Car (Vehicle vehicle = new Car();). This is known as upcasting in Java.

  4. When vehicle.move(); is called, Java looks at the actual object that vehicle refers to, which is a Car, not a Vehicle. Therefore, the move() method of Car is called, not the one of Vehicle.

  5. So, "The car moves" is printed out.

This problem has been solved

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