Hello I need help in creating a class with array methods, I got so confused.

import java.util.Scanner;
 
public class ExecuteArray
{
    public static void main(String [] args){
 
 
        Scanner sc = new Scanner(System.in);
 
 
        System.out.print("Enter the size of the array: ");
        int arraySize = sc.nextInt();
        int[] arrayElements = new int [arraySize];
 
        System.out.println();
        for (int x = 0; x < arraySize; x++){
 
            System.out.print("Enter the element for " + "[" + x + "]: ");
            arrayElements [x] = sc.nextInt();
 
        }            
 
        System.out.println("\n-----------------------------------------");
 
        System.out.println("The elements of array are: ");
 
        for (int x = 0; x < arraySize; x++){
 
            System.out.print(arrayElements[x] + " ");
 
        }
 
        System.out.println("\n\nThe maximum index of array is: ");
        System.out.println("The highest value of the array is: ");
        System.out.println("The lowest value of the array is: ");
        System.out.println("The sum of all elements in the array is: ");
        System.out.println("The the average of all elements in the array is: ");
        System.out.println("The count of all elements in the array is: ");
    }
}

Here's the output:
 


Enter the size of the array: 5



Enter the element for [0]: 25

Enter the element for [1]: 6

Enter the element for [2]: 5

Enter the element for [3]: 89

Enter the element for [4]: 26



-----------------------------------------

The elements of array are: 

25 6 5 89 26 



The maximum index of array is: 

The highest value of the array is: 

The lowest value of the array is: 

The sum of all elements in the array is: 

The the average of all elements in the array is: 

The count of all elements in the array is:



The output must be like this:
 


Enter the size of the array: 5



Enter the element for [0]: 25

Enter the element for [1]: 6

Enter the element for [2]: 5

Enter the element for [3]: 89

Enter the element for [4]: 26



-----------------------------------------

The elements of array are: 

25 6 5 89 26 



The maximum index of array is: 4

The highest value of the array is: 89

The lowest value of the array is: 5

The sum of all elements in the array is: 151

The the average of all elements in the array is: 30.2

The count of all elements in the array is: 5



The lower part must be created in another class and needs to be called in the main method using object instantiation.
These are the instructions:

Create a class in a separate file with the following methods. Name the file as ArrayMethods.
maxIndex() - returns the highest index of the array.
maxElement() - returns the highest element in the array.
minElement() - returns the lowest element in the array.
sumElement() - returns the sum of all elements in the array.
averageElement() - returns the average of all elements in the array.
countElement() - returns the number of all elements in the array.
displayElement() - display all the elements/values in the array.