CarDemo

class Car {int carnumber;void setnumber(int carnum){carnumber = carnum;}void shownumber(){System.out.print("My car No.is: "+carnumber);}}class Bus extends Car{int capacity;void setcapacity(int buscarcapacity){capacity = buscarcapacity;}void showcapacity(){System.out.println("My capacity is: "+capacity);}}class CarDemo{public static void main(String args[]){Bus DemoBus = new Bus();DemoBus.setnumber(6868);DemoBus.shownumber();DemoBus.setcapacity(30);DemoBus.showcapacity();}}