Iterator

package subiectiterator;
import java.util.*;
import java.io.*;

class Produs{
    private String cod_unic;
    private int pret;

    Produs(String cu, int p){
        cod_unic = cu;
        pret = p;
    }

    public String getCodUnic(){
        return cod_unic;
    }

    public int getPret(){
        return pret;
    }

    public String toString(){
        return cod_unic + " la pret de " + pret;
    }
}

class Parfum extends Produs{
    Parfum(String cu, int p){
        super(cu, p);
    }
}

class LotiuneCorp extends Produs{
    LotiuneCorp(String cu, int p){
        super(cu, p);
    }
}


interface Selector{
    Object current();
    boolean end();
    void next();
}

class Catalog{
    private Produs[] produse;
    private int i=0;

    Catalog(int size){
        produse = new Produs[size];
    }

    public void add(Produs p){
        if(i<produse.length) produse[i++]=p;
    }

    public void UmpleCatalog(){
        Random rand = new Random();

        int contor_p=100, contor_l=100;
        for(int i=1; i<produse.length+1; i++){
            int x = rand.nextInt(2);
            if(x==0){
                Produs nou_produs = new Parfum(("P"+contor_p), (rand.nextInt(50)+20));
                add(nou_produs);
                contor_p++;
            } else {
                Produs nou_produs = new LotiuneCorp(("LC"+contor_l), (rand.nextInt(50)+20));
                add(nou_produs);
                contor_l++;
            }
        }
    }

    int next=0;
    class SequenceSelector implements Selector{
        public Produs current(){
            return produse[next];
        }

        public boolean end(){
            return next==produse.length;
        }

        public void next(){
            next++;
        }

    }

    public void PrintareCatalog() throws FileNotFoundException {
        File file = new File("./src/subiectiterator/catagout");
        PrintWriter out = new PrintWriter(file);

        SequenceSelector selector = new SequenceSelector();
        while(!selector.end()){
            out.println(selector.current());
            selector.next();
        }

        out.close();
    }
}

public class Subiectiterator {

    public static void main(String[] args) {
        Catalog c = new Catalog(3);
        c.UmpleCatalog();

        try{
            c.PrintareCatalog();
        } catch (FileNotFoundException exept){
            System.out.println("sry errror");
        }
    }

}