Array Insertion

Array insertion refers to the process of adding elements at a specific position within an array. In Java, when you insert an element into an array, you need to shift all the elements that come after the insertion position to make room for the new element.

Here's an example of how to insert an element into an array:

1public class ArrayInsertion {
2    public static void main(String[] args) {
3        // Create an array
4        int[] numbers = {1, 2, 3, 5};
5        int insertIndex = 2;
6        int insertValue = 4;
7
8        // Shift elements to make room for the new element
9        for (int i = numbers.length - 1; i > insertIndex; i--) {
10            numbers[i] = numbers[i - 1];
11        }
12
13        // Insert the new element
14        numbers[insertIndex] = insertValue;
15
16        // Print the updated array
17        System.out.println(Arrays.toString(numbers));
18    }
19}

In this example, we have an array numbers with elements [1, 2, 3, 5]. We want to insert the value 4 at index 2.

To insert the element, we start by shifting all the elements after the insertion position to the right. This is done in the for loop, where we start from the last element and move backwards. Each element is moved to the next index, creating space for the new element.

Once the shifting is complete, we assign the insert value to the desired index. In this case, we assign 4 to index 2.

Finally, we print the updated array to verify the insertion.

Array insertion is a common operation when working with arrays. It allows you to add elements at specific positions and maintain the order and integrity of the array.

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public class ArrayInsertion {

    public static void main(String[] args) {

        // Create an array

        int[] numbers = {1, 2, 3, 5};

        int insertIndex = 2;

        int insertValue = 4;

​

        // Shift elements to make room for the new element

        for (int i = numbers.length - 1; i > insertIndex; i--) {

            numbers[i] = numbers[i - 1];

        }

​

        // Insert the new element

        numbers[insertIndex] = insertValue;

​

        // Print the updated array

        System.out.println(Arrays.toString(numbers));

    }

}