create an entity class "Product" with following properties product_id, product_name, product_details, price. Add some sample data in this product class using collections. and sort and display

create an entity class "Product"  with following properties product_id, product_name, product_details, price. Add some sample data in this product class
using collections. and sort and display  :
-->on default by product_id
-->based on product_name or price
   -->sort on product_name, if two product_name is same sort on product_details basis.
  -->sort on price, if two prices are same consider sorting on product_id basis.

Product.java

package com.test;

import java.util.Comparator;

public class Product implements Comparable<Product>{

    private int productId;

    private String productName;

    private String productDescription;

    private double price;

   

             public Product()

            {     

            }

   

            public Product(int productId, String productName, String        

                             productDescription, double price)

           {

                this.productId = productId;

                this.productName = productName;

                this.productDescription = productDescription;

                this.price = price;

           }

                     public int getProductId()

                     {

                             return productId;

                     }

                     public void setProductId(int productId)

                     {

                           this.productId = productId;

                     }

                     public String getProductName()

                     {

                            return productName;

                     }

    public void setProductName(String productName)

     {

        this.productName = productName;

     }

     public String getProductDescription()

     {

        return productDescription;

     }

     public void setProductDescription(String productDescription)

     {

        this.productDescription = productDescription;

      }

    public double getPrice()

   {

        return price;

    }

    public void setPrice(double price)

    {

        this.price = price;

    }

    @Override

    public int compareTo(Product p)

    {  

        return this.productId-p.productId;

    }

    @Override

    public String toString()

    {

        return "price=        " + price + ", productDescription=           "

                + productDescription + ", productId=           " + productId

                + ", productName=              " + productName;

    }

   

    public static class ProductInnerClass implements Comparator<Product>

    {

        @Override

        public int compare(Product p1, Product p2)

        {

            int i=Double.compare(p1.getPrice(), p2.getPrice());

            if(i==0)

            {

                return p1.getProductId()-p2.getProductId();

            }

            return i;

        }       

    }  

}

ProductMain.java

package com.alok.entity;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import com.alok.client.Product;

public class ProductMain {

    public static void main(String[] args) throws NumberFormatException, IOException {

        ArrayList<Product> productList=new ArrayList<Product>();

        productList.add(new Product(555, "Monitor", "15 inch", 4000.00));

        productList.add(new Product(2222, "Monitor", "17 inch", 5000.00));

        productList.add(new Product(3333, "Del", "Laptop", 4000.00));

        productList.add(new Product(6666, "Mouse", "Optical Mouse", 200.00));

        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

        int i=1;

        while(i<3)

        {

            System.out.println("1 : Sort by id");

            System.out.println("2 : Sort by name");

            System.out.println("3 : Sort by price");

            int ch=Integer.parseInt(br.readLine());

            switch(ch)

            {

                case 1 : Collections.sort(productList);

                         System.out.println("Sorted product : ");

                         for(Product p : productList)

                         {

                             System.out.println(p);

                         }

                         break;

                case 2 : Collections.sort(productList, new Comparator<Product>()

                         {

                                @Override

                         public int compare(Product p1, Product p2)

                         {

                         int i=p1.getProductName().compareToIgnoreCase 

                                                  (p2.getProductName());

                            if(i==0)

                            {

                            return p1.getProductDescription(). 

                             compareToIgnoreCase(p2.getProductDescription());

                            }                   

                                       return i;

                         }

                       });  

                System.out.println("Sorted product : ");

                 for(Product p : productList)

                 {

                     System.out.println(p);

                 }

                 break;

               case 3 :

             Collections.sort(productList,new Product.ProductInnerClass());

                    System.out.println("Sorted product : ");

                     for(Product p : productList)

                     {

                         System.out.println(p);

                     }

                     break;

                default : System.out.println("Invalid Option");    

                            System.exit(0);

            }

        }

    }

}

OUTPUT:

1 : Sort by id
2 : Sort by name
3 : Sort by price
1
Sorted product : 
price=        4000.0, productDescription=           15 inch, productId=           555, productName=              Monitor
price=        5000.0, productDescription=           17 inch, productId=           2222, productName=              Monitor
price=        4000.0, productDescription=           Laptop, productId=           3333, productName=              Del
price=        200.0, productDescription=           Optical Mouse, productId=           6666, productName=              Mouse
1 : Sort by id
2 : Sort by name
3 : Sort by price
2
Sorted product : 
price=        4000.0, productDescription=           Laptop, productId=           3333, productName=              Del
price=        4000.0, productDescription=           15 inch, productId=           555, productName=              Monitor
price=        5000.0, productDescription=           17 inch, productId=           2222, productName=              Monitor
price=        200.0, productDescription=           Optical Mouse, productId=           6666, productName=              Mouse
1 : Sort by id
2 : Sort by name
3 : Sort by price
3
Sorted product : 
price=        200.0, productDescription=           Optical Mouse, productId=           6666, productName=              Mouse
price=        4000.0, productDescription=           15 inch, productId=           555, productName=              Monitor
price=        4000.0, productDescription=           Laptop, productId=           3333, productName=              Del
price=        5000.0, productDescription=           17 inch, productId=           2222, productName=              Monitor
1 : Sort by id
2 : Sort by name
3 : Sort by price
4
Invalid Option