HW2.16

 import java.util.Scanner;

 public class Solution
 {
     public static void main(String[] args)
     {
         final int THERMAL_CAPACITY = 4184;
         Scanner input = new Scanner(System.in);

         System.out.print("Enter the amount of water in kilograms: ");
         double mass = input.nextDouble();

         System.out.print("Enter the initial temperature: ");
         double initialTemperature = input.nextDouble();

         System.out.print("Enter the final temperature: ");
         double finalTemperature = input.nextDouble();

         input.close();

         double energy = (finalTemperature - initialTemperature) * mass * THERMAL_CAPACITY;
         System.out.println("The energy needed is " + energy);
     }
 }