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  1. import java.util.ArrayList;
  2. import java.util.Comparator;
  3. import java.util.List;
  4.  
  5. class Coffee {
  6.     private String name;
  7.     private double pricePerKg;
  8.     private double volumePerKg;
  9.  
  10.     public Coffee(String name, double pricePerKg, double volumePerKg) {
  11.         this.name = name;
  12.         this.pricePerKg = pricePerKg;
  13.         this.volumePerKg = volumePerKg;
  14.     }
  15.  
  16.     public String getName() {
  17.         return name;
  18.     }
  19.  
  20.     public double getPricePerKg() {
  21.         return pricePerKg;
  22.     }
  23.  
  24.     public double getVolumePerKg() {
  25.         return volumePerKg;
  26.     }
  27. }
  28.  
  29. class CoffeeVan {
  30.     private double capacity;
  31.     private List<Coffee> coffees;
  32.  
  33.     public CoffeeVan(double capacity) {
  34.         this.capacity = capacity;
  35.         this.coffees = new ArrayList<>();
  36.     }
  37.  
  38.     public void addCoffee(Coffee coffee, double quantity) {
  39.         coffees.add(coffee);
  40.     }
  41.  
  42.     public void sortCoffeesByValue() {
  43.         coffees.sort(Comparator.comparingDouble((Coffee c) -> c.getPricePerKg() / c.getVolumePerKg()).reversed());
  44.     }
  45.  
  46.     public List<Coffee> findCoffeeByQuality(double minPricePerKg, double maxPricePerKg, double minVolumePerKg, double maxVolumePerKg) {
  47.         List<Coffee> result = new ArrayList<>();
  48.         for (Coffee coffee : coffees) {
  49.             if (coffee.getPricePerKg() >= minPricePerKg && coffee.getPricePerKg() <= maxPricePerKg &&
  50.                     coffee.getVolumePerKg() >= minVolumePerKg && coffee.getVolumePerKg() <= maxVolumePerKg) {
  51.                 result.add(coffee);
  52.             }
  53.         }
  54.         return result;
  55.     }
  56. }
  57.  
  58. public class Main {
  59.     public static void main(String[] args) {
  60.         Coffee espressoBeans = new Coffee("Espresso Beans", 30, 0.5);
  61.         Coffee arabicaGround = new Coffee("Arabica Ground", 20, 0.6);
  62.         Coffee instantCoffee = new Coffee("Instant Coffee", 15, 0.7);
  63.  
  64.         CoffeeVan coffeeVan = new CoffeeVan(100);
  65.         coffeeVan.addCoffee(espressoBeans, 50);
  66.         coffeeVan.addCoffee(arabicaGround, 30);
  67.         coffeeVan.addCoffee(instantCoffee, 20);
  68.  
  69.         coffeeVan.sortCoffeesByValue();
  70.  
  71.         List<Coffee> resultCoffees = coffeeVan.findCoffeeByQuality(10, 25, 0.5, 0.7);
  72.  
  73.         System.out.println("Найденный кофе:");
  74.         for (Coffee coffee : resultCoffees) {
  75.             System.out.println(coffee.getName() + " - Цена: " + coffee.getPricePerKg() + "$, Объем: " + coffee.getVolumePerKg() + " кг");
  76.         }
  77.     }
  78. }
Success #stdin #stdout 0.2s 58376KB
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stdin
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Standard input is empty
stdout
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Найденный кофе:
Arabica Ground - Цена: 20.0$, Объем: 0.6 кг
Instant Coffee - Цена: 15.0$, Объем: 0.7 кг
https://ideone.com/OTgSE7
language:
Java (HotSpot 12)
created:
18 days ago
visibility:
public

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