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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. class Meal {
  8.  
  9.     public boolean isWarm() {
  10.         return false;
  11.     }
  12.  
  13. }
  14.  
  15. class Fish extends Meal {
  16.  
  17. }
  18.  
  19. class WarmMeal extends Meal {
  20.     Meal meal;
  21.  
  22.     public WarmMeal(Meal meal) {
  23.        this.meal = meal;
  24.     }
  25.  
  26.     public boolean isWarm() {
  27.         return true;
  28.     }
  29.  
  30.     public String toString() {
  31.        return meal.toString();
  32.     } 
  33. }
  34.  
  35. class Microwave {
  36.  
  37.     public static Meal warm(Meal meal)
  38.     {
  39.         System.out.println("Pogrzewam posiłek");
  40.         return new WarmMeal(meal);
  41.     }
  42.  
  43. }
  44.  
  45.  
  46. /* Name of the class has to be "Main" only if the class is public. */
  47. class Ideone
  48. {
  49. 	public static void main (String[] args) throws java.lang.Exception
  50. 	{
  51.        Meal fish = new Fish();
  52.        System.out.println("Potrawa gotowa do pieczenia: "+fish.toString());
  53.        System.out.println("Czy ciepła?: "+fish.isWarm());
  54.        fish = Microwave.warm(fish); 
  55.        System.out.println("Potrawa podgrzana: "+fish.toString());
  56.        System.out.println("Czy ciepła?: "+fish.isWarm());
  57. 	}
  58. }
Success #stdin #stdout 0.04s 4386816KB
comments (?)
stdin 
Standard input is empty
stdout 
Potrawa gotowa do pieczenia: Fish@14ae5a5
Czy ciepła?: false
Pogrzewam posiłek
Potrawa podgrzana: Fish@14ae5a5
Czy ciepła?: true
https://ideone.com/WTCNoN
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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