I have 3 wardrobes , in each of them I added some clothes

    public static void main(String[] args) {
        Wardrobe wardrobe = new Wardrobe("LivingRoom", TypeCloset.LivingRoom);
        wardrobe.add(new Clothes(TypeClothes.blouse, 95, "Patagonia"));
        wardrobe.add(new Clothes(TypeClothes.vest, 15, "Zara"));
        wardrobe.add(new Clothes(TypeClothes.pants, 125, "Adidas"));
        wardrobe.add(new Clothes(TypeClothes.t_shirt, 55, "Nike"));

        Wardrobe wardrobe1 = new Wardrobe("BedRoom", TypeCloset.BedRoom);
        wardrobe1.add(new Clothes(TypeClothes.shoes, 120, "Nike"));
        wardrobe1.add(new Clothes(TypeClothes.blouse, 19, "Nina"));
        wardrobe1.add(new Clothes(TypeClothes.vest, 5, "China"));
        wardrobe1.add(new Clothes(TypeClothes.t_shirt, 10, "Legend"));
        wardrobe1.add(new Clothes(TypeClothes.blouse, 80, "Patagonia"));

        Wardrobe wardrobe2 = new Wardrobe("Outdoor", TypeCloset.Outdoor);
        wardrobe2.add(new Clothes(TypeClothes.t_shirt, 250, "Verse"));
        wardrobe2.add(new Clothes(TypeClothes.pants, 700, "Louis"));
        wardrobe2.add(new Clothes(TypeClothes.blouse, 360, "Balancing"));

 List<Clothes> clothesList = new ArrayList<>(); // is an empty array lsit
        List<Wardrobe> wardrobeList = new ArrayList<>(Arrays.asList(wardrobe, wardrobe1, wardrobe2));

    Map<TypeClothes, Long> numberClothesPerType = getNumberClothesPerTypeClothes(clothesList);
    System.out.println("Number Clothes per Type: "   numberClothesPerType);

}

So I want to get quantity per typeClothes like this

public static Map<TypeClothes, Long> getNumberClothesPerTypeClothes(List<Clothes> clothesList) {
    return clothesList.stream()
            .collect(Collectors.groupingBy(Clothes::getTypeClothes, Collectors.counting()));
}

My output is correct :

Number Clothes per Type: {blouse=4, pants=2, shoes=1, t_shirt=3, vest=2}

But since I do not want to make my clothesList looking like this but rather like I have done it above:

        Clothes clothes = new Clothes(TypeClothes.blouse, 95, "Patagonia");
        Clothes clothes1 = new Clothes(TypeClothes.vest, 15, "Zara");
        Clothes clothes2 = new Clothes(TypeClothes.pants, 125, "Adidas");
        Clothes clothes3 = new Clothes(TypeClothes.t_shirt, 55, "Nike");
        Clothes clothes4 = new Clothes(TypeClothes.blouse, 19, "Nina");
        Clothes clothes5 = new Clothes(TypeClothes.vest, 5, "China");
        Clothes clothes6 = new Clothes(TypeClothes.t_shirt, 10, "Legend");
        Clothes clothes7 = new Clothes(TypeClothes.blouse, 80, "Patagonia");
        Clothes clothes8 = new Clothes(TypeClothes.t_shirt, 250, "Verse");
        Clothes clothes9 = new Clothes(TypeClothes.pants, 700, "Louis");
        Clothes clothes10 = new Clothes(TypeClothes.blouse, 360, "Balancing");
        Clothes clothes11 = new Clothes(TypeClothes.shoes, 120, "Nike");

List<Clothes> clothesList = new ArrayList<>(Arrays.asList(clothes, clothes1, clothes2, clothes3, clothes4, clothes5, clothes6, clothes7, clothes8, clothes9, clothes10, clothes11));

How should I do it to get the list of clothes from the ones I added to the wardrobe but not having to create clothes and then add, so just from the ones I added?

Adding wardrobe class:

import java.util.ArrayList;
import java.util.List;

public class Wardrobe {

    List<Clothes> clothes = new ArrayList<>();
    private String name;
    private TypeCloset typeCloset;

    public Wardrobe(String name, TypeCloset typeCloset) {
        this.name = name;
        this.typeCloset = typeCloset;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public TypeCloset getType() {
        return typeCloset;
    }

    public void setType(TypeCloset typeCloset) {
        this.typeCloset = typeCloset;
    }

    @Override
    public String toString() {
        return "Wardrobe{"  
                "name='"   name   '\''  
                ", typeCloset="   typeCloset  
                '}';
    }

    public void add(Clothes newClothes) {
        clothes.add(newClothes);
    }

    public int getCount() {
        return this.clothes.size();
    }

    public Integer getPricePerCloset() {
        return this.clothes.stream()
                .mapToInt(Clothes::getPrice)
                .sum();
    }
}

CodePudding user response：

If you have implemented a get method in your Wardrobe (which you should provide the definition) like:

public list<Clothes> getClothes()

From the list of wardrobes, you can do

wardrobesList.stream().flatMap(wardrobe -> wardrobe.get().stream()).collect(Collectors.toList())

to get a list of all the Clothes (classes) you have set in the wardrobes

CodePudding user response：

This depends on the implementation of your Wardrobe class. If the wardrobe.add method just adds the clothes to a List in wardrobe i would suggest for java 8:

List<Clothes> clothesList = Arrays.asList(wardrobe.getClothes(), wardrobe1.getClothes(), wardrobe2.getClothes())
    .stream()
    .flatMap(List::stream)
    .collect(Collectors.toList());

or for java 11 and higher

List<Clothes> clothesList = List.of(wardrobe.getClothes(),wardrobe1.getClothes(),wardrobe2.getClothes())
    .stream()
    .flatMap(List::stream)
    .collect(Collectors.toList());