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Выполненное задание #1

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13 changes: 13 additions & 0 deletions src/main/java/Car.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,13 @@
class Car {
String name;
int speed;

Car(String name, int speed) {
this.name = name;
this.speed = speed;
}

int distanceFor(int duration) {
return speed * duration;
}
}
57 changes: 57 additions & 0 deletions src/main/java/CarInputManager.java
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import java.util.ArrayList;
import java.util.Scanner;

class CarInputManager {
private Scanner scanner = new Scanner(System.in);
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@Charmandik Charmandik Sep 18, 2024

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Рекомендация: - хорошей практикой является делать вызов scanner.close() после того, как сканнер больше не используется. Это необходимо для того, что бы этот объект не потреблял ресурсы, тогда когда это уже не требуется.


ArrayList<Car> inputCars() {
ArrayList<Car> cars = new ArrayList<>();
for (int i = 0; i < 3; i++) {
String carName;
Integer carSpeed;

do {
carName = inputName();
} while (carName == null);

do {
carSpeed = inputSpeed();
} while (carSpeed == null);

cars.add(new Car(carName, carSpeed));
}

return cars;
}

private String inputName() {
System.out.println("Введите название машины:");
String name = scanner.nextLine();

if (name.isEmpty()) {
System.out.println("Название не может быть пустым.\nПопробуйте ещё раз...\n");
return null;
} else {
return name;
}
}

private Integer inputSpeed() {
System.out.println("Введите скорость машины");
String speedText = scanner.nextLine();

if (!speedText.matches("-?\\d+")) {
System.out.println("Скорость должна быть целым положительным числом.\nПопробуйте ещё раз...\n");
return null;
}

Integer speed = Integer.valueOf(speedText);

if (speed > 250 || speed < 0) {
System.out.println("Скорость должна быть не больше 250 и не меньше 0.\nПопробуйте ещё раз...\n");
return null;
} else {
return speed;
}
}
}
16 changes: 14 additions & 2 deletions src/main/java/Main.java
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@@ -1,6 +1,18 @@
import java.util.ArrayList;

public class Main {
public static void main(String[] args) {
System.out.println("Hello world!");
CarInputManager inputManager = new CarInputManager();
ArrayList<Car> cars = inputManager.inputCars();
Race race = new Race(cars);
Car winnerCar = race.getWinner();

if (winnerCar == null) {
System.out.println("Нет победителя");
return;
}
System.out.printf("Самая быстрая машина: %s%n", winnerCar.name);
}
}
}


25 changes: 25 additions & 0 deletions src/main/java/Race.java
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import java.util.ArrayList;

class Race {
private ArrayList<Car> cars;
private int durationInHours = 24;

Race(ArrayList<Car> cars) {
this.cars = cars;
}

Car getWinner() {
if (cars.isEmpty()) {
return null;
}

Car winner = this.cars.get(0);
for (Car car : cars) {
if (winner.distanceFor(durationInHours) < car.distanceFor(durationInHours)) {
winner = car;
}
}

return winner;
}
}