package com.company;

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        new Scanner(System.in);
         Buildings[] b = new Buildings[3];
        for (int i = 0; i <3; i++)
            b[i] = new Buildings();

        Scanner sc = new Scanner(System.in);
        System.out.println("What do u looking for?");
        System.out.println("1. Stracts; \n 2.Check Info for number of shop");
        int choice = sc.nextInt();

        switch (choice){
            case 1:
                for (int i = 0; i <3; i++) {
                    System.out.println(b[i].number);
                    b[i].Info();
                    System.out.println("\n");
                }
                break;
            case 2:
                while (true) {
                    System.out.println("Input shop number");
                    System.out.printf("1. %d \n2. %d \n3. %d \n4. EXIT", b[0].number, b[1].number, b[2].number);
                    int choose = sc.nextInt();
                    if (choose == 4)
                        break;
                    else {
                        choose -= 1;
                        System.out.println(b[choose].number);
                        b[choose].Info();
                    }
                }
                break;
        }

    }
}
___________________________________________________________________________________________________________________
package com.company;

import java.util.Scanner;

public class Buildings {
    int number;
    Sellers[] s = new Sellers[1];

    public Buildings() {
        System.out.println("Input Building number");
        Scanner sc = new Scanner(System.in);
        number = sc.nextInt();

        for (int i = 0; i <1; i++)
            s[i] = new Sellers();

    }
    public void Info(){
        for (int i = 0; i <1; i++) {
            System.out.println(s[i].name);
            s[i].Info();
        }
    }


}
___________________________________________________________________________________________________________

package com.company;

import java.util.Scanner;

public class Sellers {
    String name;
    Products[] p = new Products[1];
    Sellers() {
        System.out.println("Input Seller name");
        Scanner sc = new Scanner(System.in);
        name = sc.nextLine();

        for (int i = 0; i <1; i++)
            p[i] = new Products();
    }
    public void Info(){
        for (int i = 0; i <1; i++) {
            System.out.println(p[i].name);
            p[i].Info();
        }
    }

}
___________________________________________________________________________________________

package com.company;

import java.util.Scanner;

public class Products {
    String name;
    Delivers[] d = new Delivers[1];

    Products() {
        System.out.println("Input Product ");
        Scanner sc = new Scanner(System.in);
        name = sc.nextLine();

        for (int i = 0; i < 1; i++)
            d[i] = new Delivers();

    }
    public void Info(){
        for (int i = 0; i < 1; i++)
            System.out.println(d[i].name);
    }
}
___________________________________________________________________________________________________________

package com.company;

import java.util.Scanner;

public class Delivers {
    String name;

    Delivers() {
        System.out.println("Input Deliver name");
        Scanner sc = new Scanner(System.in);
        name = sc.nextLine();
    }
}
_____________________________________________________________________________________________