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  1. public class Main 
  2. {
  3. 	public static void main(String[] args) {
  4. 		Animal a = new Dog();  
  5. 		Animal x = a.spawn();
  6.  
  7.  
  8. 		Dog b = new Dog();
  9. 		Dog y = b.spawn();		
  10. 	}
  11.  
  12. }
  13.  
  14.  
  15. class Animal 
  16. {
  17. 	protected int _generation = 0;
  18.  
  19. 	public Animal() {
  20. 		this(1);
  21. 	}
  22.  
  23. 	public Animal(int generation) {
  24. 		_generation = generation;
  25. 	}
  26.  
  27. 	public Animal spawn() {
  28. 		System.out.println("From Animal Spawn");
  29. 		return new Animal(_generation+1);
  30. 	}
  31. }
  32.  
  33.  
  34. class Dog extends Animal 
  35. {	
  36. 	public Dog() {
  37. 		this(1);
  38. 	}
  39.  
  40. 	public Dog(int generation) {
  41. 		_generation = generation;		
  42. 	}
  43.  
  44.  
  45. 	@Override
  46. 	public Dog spawn() {
  47. 		System.out.println("From Dog Spawn");
  48. 		return new Dog(_generation + 1);
  49. 	}
  50. }
Success #stdin #stdout 0.09s 320320KB
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From Dog Spawn
From Dog Spawn
https://ideone.com/yeCUC9
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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