@Override
 public int hashCode() {
   final int prime = 31;
   int result = 1;
   result = prime * result + ((data == null) ? 0 : data.hashCode());
   result = prime * result + ((filme == null) ? 0 : filme.hashCode());
   result = prime * result + ((hora == null) ? 0 : hora.hashCode());
   result = prime * result + ((id == null) ? 0 : id.hashCode());
   result = prime * result + ((usuario == null) ? 0 : usuario.hashCode());
   return result;
 }
 @Override
 public boolean equals(Object obj) {
   if (this == obj) return true;
   if (obj == null) return false;
   if (getClass() != obj.getClass()) return false;
   Voto other = (Voto) obj;
   if (data == null) {
     if (other.data != null) return false;
   } else if (!data.equals(other.data)) return false;
   if (filme == null) {
     if (other.filme != null) return false;
   } else if (!filme.equals(other.filme)) return false;
   if (hora == null) {
     if (other.hora != null) return false;
   } else if (!hora.equals(other.hora)) return false;
   if (id == null) {
     if (other.id != null) return false;
   } else if (!id.equals(other.id)) return false;
   if (usuario == null) {
     if (other.usuario != null) return false;
   } else if (!usuario.equals(other.usuario)) return false;
   return true;
 }