public Vector<Entity> listarV(){

		Query query = new Query("UE_area").addSort("date", Query.SortDirection.DESCENDING);
		List<Entity> UE_area = datastore.prepare(query).asList(FetchOptions.Builder.withDefaults());
		Vector<Entity>v = new Vector<Entity>();
		if (UE_area.isEmpty()) {
		    System.out.println("  no UE_area");
		} 
		else {
		   for (Entity greeting : UE_area) {
		        v.add(greeting);
		    }
		 }   
		 return v;	    
	}