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  1. import java.util.*;
  2.  
  3. class InstanciaDe {
  4. 	public static void main( String[] args ) {
  5. 		int contaF = 0;
  6. 		int contaJ = 0;
  7. 	    ContaF Rafael = new ContaF();
  8. 	    ContaJ Roberto = new ContaJ();
  9. 	    ContaJ Carlos = new ContaJ();
  10. 	    ArrayList<Conta> lista = new ArrayList<Conta>();        
  11. 	    lista.add(Rafael);
  12. 	    lista.add(Roberto);
  13. 	    lista.add(Carlos);
  14. 	    for(int i = 0 ; i < lista.size() ; i++) {
  15. 	        if (lista.get(i) instanceof ContaF) {
  16. 	            contaF++;
  17. 	        }       
  18. 	        if (lista.get(i) instanceof ContaJ) {
  19. 	            contaJ++;
  20. 	        }
  21. 	    }
  22. 	    System.out.println(contaF);
  23. 	    System.out.println(contaJ);
  24. 	}
  25. }
  26. class Conta {}
  27. class ContaF extends Conta {}
  28. class ContaJ extends Conta {}
Success #stdin #stdout 0.1s 320576KB
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https://ideone.com/CBc7t5
language:
Java (12.0.1)
created:
8 years ago
visibility:
secret

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