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  1.  
  2. interface Vehicle {
  3.     void displayDetails();
  4.     double calculateRent(int days);
  5. }
  6.  
  7. interface ExtraFeature {
  8.     void showFeature();
  9. }
  10.  
  11. class Car implements Vehicle, ExtraFeature {
  12.     public void displayDetails() {
  13.         System.out.println("Vehicle: Car");
  14.         System.out.println("Rent per day: 2000 Tk");
  15.     }
  16.  
  17.     public double calculateRent(int days) {
  18.         return days * 2000;
  19.     }
  20.  
  21.     public void showFeature() {
  22.         System.out.println("Feature: Air Conditioning Available");
  23.     }
  24. }
  25.  
  26. class Bike implements Vehicle, ExtraFeature {
  27.     public void displayDetails() {
  28.         System.out.println("Vehicle: Bike");
  29.         System.out.println("Rent per day: 800 Tk");
  30.     }
  31.  
  32.     public double calculateRent(int days) {
  33.         return days * 800;
  34.     }
  35.  
  36.     public void showFeature() {
  37.         System.out.println("Feature: Helmet Available");
  38.     }
  39. }
  40.  
  41. class RentalManager {
  42.     Vehicle processVehicle(Vehicle vehicle) {
  43.         return vehicle;
  44.     }
  45. }
  46.  
  47. public class Main {
  48.     public static void main(String[] args) {
  49.         RentalManager manager = new RentalManager();
  50.  
  51.         Vehicle v1 = manager.processVehicle(new Car());
  52.         Vehicle v2 = manager.processVehicle(new Bike());
  53.  
  54.         v1.displayDetails();
  55.         System.out.println("Total Rent: " + v1.calculateRent(3) + " Tk");
  56.         ((ExtraFeature) v1).showFeature();
  57.  
  58.         System.out.println();
  59.  
  60.         v2.displayDetails();
  61.         System.out.println("Total Rent: " + v2.calculateRent(3) + " Tk");
  62.         ((ExtraFeature) v2).showFeature();
  63.     }
  64. }
  65.  
Success #stdin #stdout 0.14s 37360KB
comments (?)
stdin 
Standard input is empty
stdout 
Vehicle: Car
Rent per day: 2000 Tk
Total Rent: 6000.0 Tk
Feature: Air Conditioning Available

Vehicle: Bike
Rent per day: 800 Tk
Total Rent: 2400.0 Tk
Feature: Helmet Available
https://ideone.com/I1eAtm
language:
Java (HotSpot 12)
created:
9 days ago
visibility:
public

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