FilterCarByBrandApproach2.java

// business logic
public static List<Car> filterCarsByBrandAndColor(List<Car> cars, String brand, String color) {
  // we can reuse the method to filtering by brand
  List<Car> filteredCarsByBrand = filterCarsByBrand(cars, brand);
  ArrayList<Car> filteredCars = new ArrayList<Car>();
  for (Car car : cars) {
    if (color.equals(car.getColor())) {
      filteredCars.add(car);
    }
  }
  return filteredCars;
}

...

// from your programm, you can call it from this way
List<Car> filteredCars = filterCarsByBrand(cars, "Ferrari", "red");