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- class Super {
- public static void main(String[] args) {
- Car car1 = new Car(12345, 14);
- Car car2 = new Car(12345, 14);
- Car car3 = new SportCar(789, 23);
- System.out.println(car1);
- System.out.println(car2);
- System.out.println(car3);
- }
- }
- class Car {
- protected int speedMax = 100;
- private long id;
- public Car(long id, int speedMax) {
- this.id = id;
- this.speedMax = speedMax;
- }
- public Car() {
- }
- @Override
- public int hashCode() {
- int result = (int) (id ^ (id >>> 32));
- result = 31 * result + speedMax;
- return result;
- }
- @Override
- public boolean equals(Object o) {
- if(this == o) return true;
- if(o == null || getClass() != o.getClass()) return false;
- Car car = (Car) o;
- if(id != car.id) return false;
- return true;
- }
- public int getSpeedMax() {
- return speedMax;
- }
- @Override
- public String toString() {
- return "My name is car.";
- }
- }
- class SportCar extends Car {
- protected int speedMax = 300;
- public SportCar(long id, int speedMax) {
- super(id, speedMax);
- }
- public int getSpeedMax() {
- return speedMax;
- }
- @Override
- public String toString() {
- return super.toString() + "Sport car.";
- }
- }
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