fork download
copy 
  1. //strategy design pattern
  2. interface DeliveryStrategy{
  3.     public void deliver(String product);
  4. }
  5. class StandardDelivery implements DeliveryStrategy{
  6.     @Override
  7.     public void deliver(String product){
  8.         System.out.println("Delivered "+product+" using Standard Delivery");
  9.     }
  10. }
  11. class ExpressDelivery implements DeliveryStrategy{
  12.     @Override
  13.     public void deliver(String product){
  14.         System.out.println("Delivered "+product+" using Express Delivery");
  15.     }
  16. }
  17. class SameDayDelivery implements DeliveryStrategy{
  18.     @Override
  19.     public void deliver(String product){
  20.         System.out.println("Delivered "+product+" using Same Day Delivery");
  21.     }
  22. }
  23. class PickupDelivery implements DeliveryStrategy{
  24.     @Override
  25.     public void deliver(String product){
  26.         System.out.println(product+" Ready for Pickup");
  27.     }
  28. }
  29.  
  30. class DeliveryContext{
  31.     private DeliveryStrategy strategy;
  32.  
  33.     public DeliveryContext(DeliveryStrategy strategy){
  34.         this.strategy = strategy;
  35.     }
  36.  
  37.     public void setStrategy(DeliveryStrategy strategy){
  38.         this.strategy = strategy;
  39.     }
  40.     public void processDelivery(String product){
  41.         strategy.deliver(product);
  42.     }
  43. }
  44.  
  45. public class Main{
  46.     public static void main(String[] args)
  47.     {
  48.         DeliveryContext context = new DeliveryContext(new StandardDelivery());
  49.         context.processDelivery("Laptop");
  50.  
  51.         context.setStrategy(new ExpressDelivery());
  52.         context.processDelivery("Moblie");
  53.  
  54.         context.setStrategy(new SameDayDelivery());
  55.         context.processDelivery("Book");
  56.  
  57.         context.setStrategy(new PickupDelivery());
  58.         context.processDelivery("Anything");
  59.     }
  60. }
  61.  
Success #stdin #stdout 0.11s 55488KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Delivered Laptop using Standard Delivery
Delivered Moblie using Express Delivery
Delivered Book using Same Day Delivery
Anything Ready for Pickup
https://ideone.com/MUO9c5
language:
Java (HotSpot 12)
created:
2 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!