Question

This program needs to be in Java

Exercise on Single Dimensional Arrays

1. Declare an array reference variable arrayInt for an array of integers. Create the array of size 100, and assign it to arrayInt. (2 points)
2. Write a method to populate the array with Random numbers between 1 to 25. Signature of the method is: populateArray( int[] ) which returns nothing. Call this method from main with arrayInt--> populateArray(arrayInt). (2 points)
3. Write a method to print an array. Signature of the method is: printArray( int[] ) which returns nothing. Print maximum of ten(10) numbers on a line (see sample output below). Call this method from main with arrayInt--> printArray(arrayInt). Hint: Use the modulus operator. Any number n % 10 will return a value 0-9. (3 points)
4. Write a method that finds the average of the array elements. Signature of the method is: findAverage( int[] ) which returns the averageto the calling program.Call this method from main with arrayInt--> findAverage(arrayInt).  (3 points)

SAMPLE OUTPUT:

1   12 20  11  10  15  17   5  20   8  
23   6     4  20  23  15  15  24   4  19  
3   10    15  12   8   5  23  24   2  25  
2   19    13   3   7  22  17   8  15   9  
22  17     3   5   5  20  24  19  21  13  
9    1    16   5  16   8  24  11   7   1  
19  16    14  11  23  22  23  25  18   3  
16   3    10   3  17  15   3  17  15  17  
22  16    16   7  15   7  10  22  10   1  
21  20    18   4  11  24  24   2  19  12
The average is: 12.51

Answer 1

JAVA Program:

import java.io.*;
import java.util.*;
public class Main
{
public static void populateArray(int []arrayInt){
Random rand=new Random();
for(int i=0;i<100;i++)
arrayInt[i]=rand.nextInt(25)+1;
}
  
public static void printArray(int []arrayInt){
int i=0;
while(i<100){
System.out.print(arrayInt[i]+" ");
i++;
if(i%10==0)
System.out.println();
}
}
  
public static float findAverage(int []arrayInt){
float total=0;
for(int i=0;i<100;i++)
total+=arrayInt[i];
return total/100;
}
  
   public static void main(String[] args) {
       int[] arrayInt = new int[100];
       populateArray(arrayInt);
       printArray(arrayInt);
       System.out.printf("The average is: %.2f",findAverage(arrayInt));
   }
}

Output: