Java Program to Insert an Element in a Specified Position in an Array

The following program shows how to insert an element at a specific position in an Array in Java.

The program takes the following as input:

• The size of an array.
• Value of elements of an array.
• The position where the user wants to insert the new element.
• The value of the element itself that the user wants to insert.

Lastly displays the final result where the new elements have been inserted.

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Program to Insert an Element in an Array at a Specified Position in Java

import java.util.Scanner;
public class Insert_Array
{
  public static void main(String[] args)
  {
    int n, x, pos;
    Scanner s = new Scanner(System.in);

    System.out.print("Enter size of an Array: ");
    n = s.nextInt();

    int a[] = new int[n + 1];

    System.out.println("Enter " + n + " elements in an array:");
    for (int i = 0; i < n; i++)
    {
      a[i] = s.nextInt();
    }

    System.out.print("Enter the position where you want to insert new element: ");
    pos = s.nextInt();

    System.out.print("Enter the element you want to insert at " + pos + " position: ");
    x = s.nextInt();

    //insertion
    for (int i = (n - 1); i >= (pos - 1); i--)
    {
      a[i + 1] = a[i];
    }
    a[pos - 1] = x;

    //Displaying after insertion
    System.out.print("Array after insertion: ");
    for (int i = 0; i < n; i++)
    {
      System.out.print(a[i] + " ");
    }
    System.out.print(a[n]);
  }
}

Output:

Enter size of an Array: 5
Enter 5 elements in an array:
1
2
3
4
5
Enter the position where you want to insert new element: 3
Enter the element you want to insert at 3 position: 9
Array after insertion: 1 2 9 3 4 5

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