public int getSubHeap(int idx, V[] vet){
    if(vet==null){
		return 0;
	}
	List<Integer> list=new ArrayList<>();
	list.addAll((List<Integer>)this.iterator());
	recursive(idx,vet,0,list);
	return v.lenght;

}

private void recursive(int idx,V[] vet,int posicao,List<Integer> list){
	if(list.get(idx)==null){
		return;
	}
	vet.add(list.get(idx));
	recursive(2*idx,vet,list);
	recursive(2*idx+1,vet,list);
}