Java: Insert an element into an array

Last update on May 09 2025 12:51:51 (UTC/GMT +8 hours)

9. Insert element at specific position

Write a Java program to insert an element (specific position) into an array.

Pictorial Presentation:

Sample Solution:

Java Code:

// Import the Arrays class from the java.util package.
import java.util.Arrays; 

// Define a class named Exercise9.
public class Exercise9 {
    
    // The main method where the program execution starts.
    public static void main(String[] args) {
        // Declare and initialize an integer array 'my_array'.
        int[] my_array = {25, 14, 56, 15, 36, 56, 77, 18, 29, 49};
        
        // Define the position where the new element will be inserted.
        int Index_position = 2;
        
        // Define the value of the new element to be inserted.
        int newValue = 5;

        // Print the original array using Arrays.toString() method.
        System.out.println("Original Array : " + Arrays.toString(my_array));     
        
        // Loop to shift elements to make space for the new element.
        for (int i = my_array.length - 1; i > Index_position; i--) {
            my_array[i] = my_array[i - 1];
        }
        
        // Insert the new element at the specified position.
        my_array[Index_position] = newValue;
        
        // Print the modified array with the new element.
        System.out.println("New Array: " + Arrays.toString(my_array));
    }
}

Sample Output:

Original Array : [25, 14, 56, 15, 36, 56, 77, 18, 29, 49]                                                     
New Array: [25, 14, 5, 56, 15, 36, 56, 77, 18, 29] 

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to insert an element into a sorted array while maintaining the order.
• Write a Java program to insert multiple elements at specific positions in an array.
• Write a Java program to insert an element at the beginning of an array without using built-in methods.
• Write a Java program to insert elements from another array at alternate positions.

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