Popcorn Hack 1

import java.util.Random;

public class Random2DArray {
    public static void main(String[] args) {
        int numRows = 4; // Change this to the desired number of rows
        int numCols = 4; // Change this to the desired number of columns
        int[][] randomArray = new int[numRows][numCols];

        Random random = new Random();

        for (int i = 0; i < numRows; i++) {
            for (int j = 0; j < numCols; j++) {
                randomArray[i][j] = random.nextInt(100); // Generates random integers between 0 and 99
            }
        }

        // Print the random 2D array
        for (int i = 0; i < numRows; i++) {
            for (int j = 0; j < numCols; j++) {
                System.out.print(randomArray[i][j] + " ");
            }
            System.out.println(); // Move to the next row
        }
    }
}

Popcorn Hack 2

public class Main {
    public static void main(String[] args) {
        int[][] myArray = {
            {1, 2, 3},
            {4, 5, 6},
            {7, 8, 9}
        };
        int desiredVal = 12;
        myArray[2][2] = 12;
        System.out.print(myArray[2][2]);
    }
}

Main.main(null)

12

Popcorn Hack 3

public class Main {
    public static void main(String[] args) {
        int[][] myArray = {
            {1, 2, 11},
            {14, 5, 21},
            {25, 28, 70}
        };

        for (int i = 0; i < myArray.length; i++) { // Loop through the rows
            for (int j = 0; j < myArray[i].length; j++) { // Loop through the columns
                int x = myArray[i][j];
                if(x %7 == 0){
                    System.out.print(myArray[i][j] + " "); // Print out the element
                }
            }
            System.out.println(); // Print a new line
        }
        
    }
}

Main.main(null)

14 21 
28 70