package Class; public class main { public static void main(String[] args) { // part here is accesing abstrract and its concreate class. Cat obj = new Cat(); obj.makeSound(); obj.eat(); // its not cat class function but as cat is inheriting animal so it can access animal class method as well. // interface implementation. Car alto = new Car(); alto.playMusic(); alto.stopMusic(); alto.startCar(); alto.stopCar(); } }