Question

Write two Java classes.

A Numbers class has five fields -- maximum, minimum, sum, count, and average.

• An input() method will prompt for and input a sequence of double inputs, negative to quit, calculating and updating the five fields as the doubles are input.
• A getMax() method returns the maximum of the doubles.
• A getMin() method returns the minimum of the doubles.
• A getSum() method returns the sum of the doubles.
• A getCount() method returns the number of doubles that were input.
• A getAverage() method returns the average of the doubles.
• A toString() method returns a String that shows all of the fields, nicely labeled.

A Driver class contains a main method.

• It instantiates a Numbers object, calls its input() method and prints out the toString() method.
• It allows the user to repeat as desired.

Answer 1

import java.util.Scanner;
class Numbers
{
   private double maximum,minimum,sum,average;
   private int count;
  

   public void Input()
   {
       System.out.println("Enter the numbers .Enter negative numbers to end");
       Scanner input = new Scanner(System.in);
       double n;
       sum = 0;
       count = 0;
       maximum = 0;
       minimum = 9999;
       do
       {
           n = input.nextDouble();
           if(n < 0)
           break;
           sum = sum+n;
           count++;
           if(n> maximum)
           maximum = n;
           if(minimum > n)
           minimum = n;
       }while(n>= 0);
       average = sum/count;
   }
   public double getMax()
   {
       return maximum;
   }
   public double getMin()
   {
       return minimum;
   }
   public double getSum()
   {
       return sum;
   }
   public int getCount()
   {
       return count;
   }
   public double getAverage()
   {
       return average;
   }
   public String toString()
   {
       return "Sum = "+getSum()+"\nMaximum = "+getMax()+"\nMinimum = "+getMin()+"\nCount = "+getCount()+"\nAverage = "+getAverage();
   }
}
class Driver
{
   public static void main (String[] args)
   {
       Numbers num = new Numbers();
       num.Input();
      
       System.out.println(num);
   }
}

Output:

Enter the numbers .Enter negative numbers to end
56.7
34.5
87.3
66.1
43.9
-1
Sum = 288.5
Maximum = 87.3
Minimum = 34.5
Count = 5
Average = 57.7

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