package com.java.planforexams.array;
import java.util.ArrayList;
public class RemoveElementFromArray {
	public static void main(String[] args) {
	ArrayList<Integer> arrayList = new ArrayList<Integer>(3);
	arrayList.add(0,11);
	arrayList.add(1,21);
	arrayList.add(2,31);
    System.out.println("Current Array List"+arrayList);
    
    arrayList.remove(0);
    System.out.println("Array List after removing 1st Index element");
    for (Integer arrayElement : arrayList) {
    	 System.out.println("Element is " +arrayElement);
    }
    arrayList.remove(1);
    System.out.println("Array List after removing  2nd Index element");
    for (Integer arrayElement : arrayList) {
   	 System.out.println("Element is " +arrayElement);
   }
 }
}
Output: 
Current Array List[11, 21, 31]
Array List after removing 1st Index element
Element is 21
Element is 31
Array List after removing  2nd Index element
Element is 21

package com.java.planforexams.array;
import java.util.Scanner;
public class ArrayElementAverage {
	public static void main(String[] args) {
		// Scanner object for reading User Input
				Scanner scan = new Scanner(System.in);
				int count,arrayElemntSum = 0;
				float arrayElementAverage;
				// Receive the Array Element Count from User
				System.out.print("Provide the Array Element Count : ");
				// Get the Array Count
				count = scan.nextInt();
				//Set the Array Size with Count value
				int arrayInputFromUser[] = new int[count];
				// Receive the Array Elements from User.
				System.out.println("Enter the elements:");
				// Iterate the array elements
				for (int incr=0; incr<count; incr++)
				{
					arrayInputFromUser[incr] = scan.nextInt();
					arrayElemntSum = arrayElemntSum + arrayInputFromUser[incr];
				}
				arrayElementAverage = (float)arrayElemntSum / count;
				System.out.print("Average of the array elements is : " +arrayElementAverage);
	}
}
Output:
Provide the Array Element Count : 6
Enter the elements:
2
12
43
56
7
8
Average of the array elements is : 21.333334