HashCodeTest.java

public static void main(String[] args) {
    Car fiat1 = new Car("Fiat", new BigDecimal(4000));
    Car fiat2 = new Car("Fiat", new BigDecimal(4000));
    System.out.println(fiat2.hashCode() == fiat1.hashCode()); //false
    System.out.println(fiat2.equals(fiat1)); //true
}