Question

g 4.16 Write a program that takes any number of non-negative integers as input, and outputs the average and max. A negative integer ends the input and is not included in the statistics. Ex: When the input is:

Answer 1

import java.util.ArrayList;

import java.util.Scanner;

import java.util.Collections;

public class num4 {

public static void main(String[] args) {

int sum = 0;

Scanner in = new Scanner(System.in);

System.out.println("Enter number");

int num = in.nextInt();

ArrayList<Integer> list = new ArrayList<>();

while (num >= 0){

list.add(num);

System.out.println("Enter another positive number, enter a negative to stop");

num = in.nextInt();

}

int maximum = Collections.max(list);

int listSize = list.size();

for(int i:list){

sum = sum+i;

}

double average = (double) sum/listSize;

System.out.println("Maximum number entered is "+maximum);

System.out.println("Average of the number is "+average);

}

}

Step-by-step explanation:

In this program:

• A Scanner class is used to receive user input and store in a variable
• A while loop with the condition while (num >= 0) is used to ensure only non-negative numbers are entered
• An ArrayList is created and used to store all the user's valid entries
• The Max Method in the Collections class is used to find the maximum value entered
• To find the average, a for loop is used to add all elements in the list and divide by the size of the list
• Finally the Average and maximum is printed out