Java - NullPointerException When Trying to Access Elements in a Multidimensional Array After Modification
I've tried everything I can think of but I'm testing a new approach and I'm working with a `NullPointerException` when I'm trying to access elements in a multidimensional array in Java after modifying it... Here’s a simplified version of what I’ve implemented: ```java public class ArrayModification { public static void main(String[] args) { String[][] myArray = new String[3][3]; myArray[0][0] = "Hello"; myArray[1][1] = "World"; // Modifying the array for (int i = 0; i < myArray.length; i++) { for (int j = 0; j < myArray[i].length; j++) { if (myArray[i][j] == null) { myArray[i][j] = "Modified"; } } } // Accessing elements after modification System.out.println(myArray[1][1].toUpperCase()); // This works System.out.println(myArray[1][0].toUpperCase()); // Throws NullPointerException } } ``` I assumed that the nested loop would replace any null elements, but it seems that not all elements were modified as expected. When I try to access `myArray[1][0]`, I'm expecting it to be "Modified", but it's still null, resulting in a `NullPointerException`. I’ve also checked the array size and its initialization, and everything seems fine. I tried printing out each element in the array after the modification loop to debug it, and I can see that `myArray[1][0]` remains null. I've also attempted to replace the nested loop with a simple array initializer, but that didn’t work either. Could anyone guide to understand why `myArray[1][0]` is still null and how to fix this scenario? I’m using Java 11. Is there a better approach? The project is a microservice built with Java. Is there a simpler solution I'm overlooking?