A supermark wants to reward its best customer of each day, showing the customer\

Question

A supermark wants to reward its best customer of each day, showing the customer's name on a screen in the supermarket. For that purpose, the customer's purchase amount is stored in an ArrayList<Double> and the customer's name is tored in a corresponding ArrayList<String>. Implement a method public static String nameOfBestCustomer(ArrayList<Double> sales, ArrayList<String> customers), that returns the name of the customer with the largest sale.

Write a program that prompts the cashier to enter all prices and names, adds them to two array lists, calls the method that you implemented, and displays the result. Use a price of 0 as a sentinel.

This is for Java for Everyone Second Addition Business P6.30

Explanation / Answer

Supermark.java

import java.util.ArrayList;
import java.util.Scanner;

public class Supermark {

  
   public static void main(String[] args) {
       Scanner scan = new Scanner(System.in);
       ArrayList<Double> sales = new ArrayList<Double>();
       ArrayList<String> customers = new ArrayList<String>();
       while(true){
           System.out.println("Enter customer name: ");
           String name =scan.nextLine();
           System.out.println("Enter customer sales: ");
           double price = scan.nextDouble();
           scan.nextLine();
           if(price == 0){
               break;
           }
           sales.add(price);
           customers.add(name);
       }
       String customerName = nameOfBestCustomer(sales, customers);
       System.out.println("Best customer is "+customerName);
   }
   public static String nameOfBestCustomer(ArrayList<Double> sales, ArrayList<String> customers){
           double max = 0;
           int maxIndex = 0;
           for(int i=0; i<sales.size(); i++){
               if(max < sales.get(i)){
                   max = sales.get(i);
                   maxIndex = i;
               }
           }
           return customers.get(maxIndex);
   }
}

Output:

Enter customer name:
Suresh Murapaka
Enter customer sales:
100
Enter customer name:
Sekhar Murapaka
Enter customer sales:
120
Enter customer name:
Anshu Murapaka
Enter customer sales:
150
Enter customer name:
Revathi M
Enter customer sales:
130
Enter customer name:
AAAA
Enter customer sales:
0
Best customer is Anshu Murapaka

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