Computer scienceProgramming languagesJavaCode organizationObject-oriented programmingClass hierarchiesBuilding class hierarchies

Inheritance

Theory

Wheels of inheritance: Vrooming OOP

Report a typo

Design a simple vehicle hierarchy with a base class 'Vehicle' and two subclasses 'Car' and 'Motorcycle'. The 'Vehicle' class should have properties 'brand' and 'year'. 'Car' should add a 'numDoors' property, while 'Motorcycle' should add a 'hasSidecar' property. Implement appropriate constructors and a 'displayInfo()' method for each class. Create instances based on user input and display their information. Input: Read three lines containing the vehicle type ("Car" or "Motorcycle"), brand, and year. For Car, also read the number of doors. For Motorcycle, read a boolean indicating if it has a sidecar. Output: Print the vehicle information using the displayInfo() method.

Sample Input 1: 

Car
Toyota
2022
4

Sample Output 1: 

Toyota (2022)
Number of doors: 4

Sample Input 2: 

Motorcycle
Harley
2021
true

Sample Output 2: 

Harley (2021)
Has sidecar: true
Write a program in Java 17
import java.util.Scanner;

public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);

// TODO: Implement the Vehicle class

// TODO: Implement the Car class (extends Vehicle)

// TODO: Implement the Motorcycle class (extends Vehicle)

// Read input and create appropriate vehicle object
String vehicleType = scanner.nextLine();
String brand = scanner.nextLine();
int year = Integer.parseInt(scanner.nextLine());

if (vehicleType.equals("Car")) {
int numDoors = Integer.parseInt(scanner.nextLine());
// TODO: Create a Car object and call displayInfo()
} else if (vehicleType.equals("Motorcycle")) {
boolean hasSidecar = Boolean.parseBoolean(scanner.nextLine());
// TODO: Create a Motorcycle object and call displayInfo()
}

scanner.close();
}
}

Create a free account to access the full topic