Java program for Shipping Corporation using Inheritance

/* Shipping corporation using inheritance */

import java.io.*;

class Smartphone
{
    protected String brand;
    protected double screenSize;
    
    public Smartphone(String br, double ss)
    {
        brand = br;
        screenSize = ss;
    }
}

class SmartphoneStorage extends Smartphone
{
    protected int storage;
    public SmartphoneStorage(String br, double ss, int st)
    {
        super(br,ss);
        storage = st; 
    }
}

class SmartphoneCamera extends SmartphoneStorage
{
    protected int camera;
    public SmartphoneCamera(String br, double ss, int st, int cm)
    {
        super(br,ss,st);
        camera = cm;
    }
}

class SmartphoneOS extends SmartphoneCamera
{
    protected String operatingSystem;
    public SmartphoneOS(String br, double ss, int st, int cm, String os)
    {
        super(br,ss,st,cm);
        operatingSystem = os;
    }
}

class Shipment extends SmartphoneOS
{
    protected double cost;
    protected int totalAmount;
    public Shipment(String br, double ss, int st, int cm, String os, double cst, int tAmount)
    {
        super(br,ss,st,cm,os);
        cost = cst;
        totalAmount=tAmount;
    }
    
    public double shipmentCost()
    {
        return totalAmount*cost;
    }
}

class Main 
{
    public static void main(String args[]) 
    {
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        
        try
        {
            System.out.println("Enter number of shipments: ");
            int n = Integer.parseInt(br.readLine());
            Shipment spmt[]=new Shipment[n];
            
            for(int i=0; i<n; i++)
            {
                System.out.println("Enter shipment "+i+1+" details");
                
                System.out.print("\tEnter Brand: ");
                String brand = br.readLine();
                
                System.out.print("\tEnter Screen Size: ");
                double ss = Double.valueOf(br.readLine());
                
                System.out.print("\tEnter Storage Capacity: ");
                int st = Integer.parseInt(br.readLine());
                
                System.out.print("\tEnter Camera: ");
                int cm = Integer.parseInt(br.readLine());
                
                System.out.print("\tEnter Operating System: ");
                String os = br.readLine();
                
                System.out.print("\tEnter Cost per phone: ");
                double cst = Double.valueOf(br.readLine());
                
                System.out.print("\tEnter total amount: ");
                int tAmount = Integer.parseInt(br.readLine());
                               
                spmt[i]=new Shipment(brand,ss,st,cm,os,cst,tAmount);
            }
            
            for(int i=0; i<n; i++)
            {
                System.out.println("\nShipment "+i+1+" details");
        
                System.out.println("\tBrand: "+spmt[0].brand);
                System.out.println("\tScreen Size: "+spmt[0].screenSize+" Inch");
                System.out.println("\tStorage Capacity: "+spmt[0].storage+" Gb");
                System.out.println("\tCamera: "+spmt[0].camera+" Megapixel");
                System.out.println("\tOperating System: "+spmt[0].operatingSystem);
                System.out.println("\tCost per phone: "+spmt[0].cost+" Rupees");
                System.out.println("\tTotal Shipment Amount: "+spmt[0].totalAmount);
                System.out.println("\n\tTotal Shipment Cost: "+spmt[0].shipmentCost()+" Rupees");
                
                System.out.println(); 
            }      
        }
        catch(Exception e)
        {
            System.err.println(e);
        }
    }
}

Output