Я использую метод findFirst, но видимо как то криво
package com.javarush.task.pro.task18.task1820;
import java.util.Comparator;
import java.util.Optional;
import java.util.stream.Stream;
/*
Самый дорогой автомобиль
*/
public class Solution {
public static void main(String[] args) {
var tesla = Stream.of(
new Car("Model S", 94_490),
new Car("Model 3", 50_690),
new Car("Model X", 99_690),
new Car("Model Y", 65_000)
);
var bmw = Stream.of(
new Car("X5", 110_000),
new Car("X3", 54_000),
new Car("X7", 143_000),
new Car("X6", 125_000)
);
Optional<Car> mostExpensiveCar = getMostExpensiveCar(tesla);
mostExpensiveCar.ifPresent(System.out::println);
Optional<Car> moreExpensiveCar = mostExpensiveCar.flatMap(car -> getMoreExpensiveCar(bmw, car));
moreExpensiveCar.ifPresent(System.out::println);
}
public static Optional<Car> getMostExpensiveCar(Stream<Car> cars) {
Optional<Car> mostExpCar = cars.max(Comparator.comparingInt(Car::getPrice));
//напишите тут ваш код
return mostExpCar;
}
public static Optional<Car> getMoreExpensiveCar(Stream<Car> cars, Car mostExpensiveCar) {
Optional<Car> mostExpCar = Optional.of(cars.filter(x -> x.getPrice() > mostExpensiveCar.getPrice()).findFirst().get());//напишите тут ваш код
return mostExpCar;
}
}
class Car {
private String name;
private Integer price;
public Car(String name, Integer price) {
this.name = name;
this.price = price;
}
public String getName() {
return name;
}
public Integer getPrice() {
return price;
}
@Override
public String toString() {
return "Автомобиль " + name + ", цена - " + price + " USD";
}
}