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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.ArrayList;
  4. import java.util.Comparator;
  5. import java.util.List;
  6.  
  7. class Coffee {
  8.     private String name;
  9.     private double pricePerKg;
  10.     private double volumePerKg;
  11.  
  12.     public Coffee(String name, double pricePerKg, double volumePerKg) {
  13.         this.name = name;
  14.         this.pricePerKg = pricePerKg;
  15.         this.volumePerKg = volumePerKg;
  16.     }
  17.  
  18.     public String getName() {
  19.         return name;
  20.     }
  21.  
  22.     public double getPricePerKg() {
  23.         return pricePerKg;
  24.     }
  25.  
  26.     public double getVolumePerKg() {
  27.         return volumePerKg;
  28.     }
  29. }
  30.  
  31. class CoffeeVan {
  32.     private double capacity;
  33.     private List<Coffee> coffees;
  34.  
  35.     public CoffeeVan(double capacity) {
  36.         this.capacity = capacity;
  37.         this.coffees = new ArrayList<>();
  38.     }
  39.  
  40.     public void addCoffee(Coffee coffee, double quantity) {
  41.         coffees.add(coffee);
  42.     }
  43.  
  44.     public void sortCoffeesByValue() {
  45.         coffees.sort(Comparator.comparingDouble((Coffee c) -> c.getPricePerKg() / c.getVolumePerKg()).reversed());
  46.     }
  47.  
  48.     public List<Coffee> findCoffeeByQuality(double minPricePerKg, double maxPricePerKg, double minVolumePerKg, double maxVolumePerKg) {
  49.         List<Coffee> result = new ArrayList<>();
  50.         for (Coffee coffee : coffees) {
  51.             if (coffee.getPricePerKg() >= minPricePerKg && coffee.getPricePerKg() <= maxPricePerKg &&
  52.                     coffee.getVolumePerKg() >= minVolumePerKg && coffee.getVolumePerKg() <= maxVolumePerKg) {
  53.                 result.add(coffee);
  54.             }
  55.         }
  56.         return result;
  57.     }
  58. }
  59.  
  60. public class Main {
  61.     public static void main(String[] args) {
  62.         Coffee espressoBeans = new Coffee("Espresso Beans", 30, 0.5);
  63.         Coffee arabicaGround = new Coffee("Arabica Ground", 20, 0.6);
  64.         Coffee instantCoffee = new Coffee("Instant Coffee", 15, 0.7);
  65.  
  66.         CoffeeVan coffeeVan = new CoffeeVan(100);
  67.         coffeeVan.addCoffee(espressoBeans, 50);
  68.         coffeeVan.addCoffee(arabicaGround, 30);
  69.         coffeeVan.addCoffee(instantCoffee, 20);
  70.  
  71.         coffeeVan.sortCoffeesByValue();
  72.  
  73.         List<Coffee> resultCoffees = coffeeVan.findCoffeeByQuality(10, 25, 0.5, 0.7);
  74.  
  75.         System.out.println("Найденный кофе:");
  76.         for (Coffee coffee : resultCoffees) {
  77.             System.out.println(coffee.getName() + " - Цена: " + coffee.getPricePerKg() + "$, Объем: " + coffee.getVolumePerKg() + " кг");
  78.         }
  79.     }
  80. }
Success #stdin #stdout 0.21s 58332KB
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stdin
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Standard input is empty
stdout
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Найденный кофе:
Arabica Ground - Цена: 20.0$, Объем: 0.6 кг
Instant Coffee - Цена: 15.0$, Объем: 0.7 кг
https://ideone.com/ujJze2
language:
Java (HotSpot 12)
created:
17 days ago
visibility:
public

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