Answer:
//Import the Random class to allow for the generation of random numbers
import java.util.Random;
public class SingleDimensionalArray {
public static void main(String[] args) {
// Declaration of an array reference variable for an array of integers
int[] arrayInt;
// Creating an array of size 100 and assigning it to arrayInt
arrayInt = new int[100];
// Call the method to populate array
populateArray(arrayInt);
// Call the method to print array elements with a maximum of ten numbers on a
// line
printArray(arrayInt);
// Call the method to find the average of the elements in the array
System.out.println("\nThe average of the array elements is " + findAverage(arrayInt));
}
// Method to populate array with random numbers between 1 and 25
// Since it is not specified, 1 and 25 are not inclusive
public static void populateArray(int[] arr) {
// Create an object of the Random class to generate the random numbers
Random random = new Random();
// Create a loop that cycles 100 times beginning at n=0
// At every cycle, generate a random number and add it to the array
for (int n = 0; n < arr.length; n++) {
arr[n] = random.nextInt(23) + 2;
}
}
// Method to print the elements in an array
public static void printArray(int[] arr) {
// Create a loop that cycles through the array.
// At each cycle, the element in the array corresponding to the pointer (n) of
// the array is printed.
// There are going to be 100 elements, maximum of 10 per line.
// The if statement checks if 10 elements are already printed on a line.
// If that's the case, a new line is printed for the next set of 10 elements.
for (int n = 0; n < arr.length; n++) {
if ((n > 0) && (n % 10 == 0)) {
System.out.println();
}
System.out.print(arr[n] + " ");
}
}
// Method to calculate the average of the elements in the given array
public static double findAverage(int[] arr) {
// An integer variable to hold the sum of the elements is declared and
// initialized to zero.
int sum = 0;
// A loop to cycle through the array while cumulatively summing the elements is
// created.
for (int n = 0; n < arr.length; n++) {
sum += arr[n];
}
// The average of the elements is calculated using the result from the sum
// above. The value is being type-cast to get a floating point value of the
// average. This is the right thing to do as the average of numbers is more
// likely to be a floating point number.
// The result of the average is stored in a double variable called 'average'.
double average = (double) sum / arr.length;
// The average of the elements is returned from the method
return average;
}
}
Explanation:
Please download the file attached to this response for a proper formatting of the code. The code contains comments explaining every segment of the code. Carefully go through the comments in the code.
Note: The function printArray() prints all the elements in the array - 10 elements per line. Since there is no sample format specified, I have assumed that the elements are separated just by spaces.
Hope this helps!
