Java Program to insert element to an array

Program

import java.util.Scanner;
public class InsertElementsToArray {
    public static void main(String[] args) {
    int newElement;
    int i;
    System.out.println("Enter the required size of the array: ");
    Scanner reader = new Scanner(System.in);
    int size = reader.nextInt();
    int inputArray[] = new int [size+1];
    System.out.println("Enter the elements of the array: ");
    for(i=0; i<size; i++){
        inputArray[i] = reader.nextInt();            
     }
     System.out.print("Enter the element which you want to insert: ");
     newElement = reader.nextInt(); 
     inputArray[size] = newElement;
     System.out.print("Printing array elements after inserting : ");
     for(i = 0; i < size; i++) {
            System.out.print(inputArray[i]+",");
        }
        System.out.print(inputArray[size]);
    }
}

This Java program demonstrates how to insert an element into an array.

1. Input Array Size and Elements:

   • The user is prompted to input the size of the array (size) using a Scanner object.
   • An integer array inputArray[] is created with a size of size + 1 to accommodate the new element.
   • The user enters the array elements, which are stored in the first size positions of inputArray.

2. Insert New Element:

   • The user is prompted to input the new element to be inserted.
   • The new element is stored at the last position of the array (inputArray[size]).

3. Display Array:

   • A for loop is used to print the array elements, including the newly inserted element.

Key Points:

• Array Size:
  • The array is initialized with one extra position to allow insertion of a new element without overwriting existing data.
• Limitations:
  • The program does not allow insertion at a specific index. To achieve that, additional logic would be required to shift elements.
• Static Array:
  • The size of the array is fixed after creation, demonstrating a simple approach to array manipulation without using dynamic data structures like ArrayList.

Output

javac .\InsertElementsToArray.java
java InsertElementsToArray        
Enter the required size of the array: 
3
Enter the elements of the array: 
11
22
33
Enter the element which you want to insert: 44
Printing array elements after inserting : 11,22,33,44