Finding the Kronecker product of two matrices

Here’s an example of a Java program that finds the Kronecker product of two matrices:

   public class KroneckerProduct {

    public static int[][] kroneckerProduct(int[][] matrixA, int[][] matrixB) {

        int rowsA = matrixA.length;

        int colsA = matrixA[0].length;

        int rowsB = matrixB.length;

        int colsB = matrixB[0].length;

        int[][] result = new int[rowsA * rowsB][colsA * colsB];

        for (int i = 0; i < rowsA; i++) {

            for (int j = 0; j < colsA; j++) {

                for (int k = 0; k < rowsB; k++) {

                    for (int l = 0; l < colsB; l++) {

                        result[i * rowsB + k][j * colsB + l] = matrixA[i][j] * matrixB[k][l];

                    }

                }

            }

        }

        return result;

    }

    public static void main(String[] args) {

        int[][] matrixA = { { 1, 2 }, { 3, 4 } };

        int[][] matrixB = { { 5, 6 }, { 7, 8 } };

        int[][] kroneckerProduct = kroneckerProduct(matrixA, matrixB);

        // Printing the Kronecker product matrix

        for (int[] row : kroneckerProduct) {

            for (int element : row) {

                System.out.print(element + " ");

            }

            System.out.println();

       }
    }
}

In this program, the `kroneckerProduct` method calculates the Kronecker product of two matrices `matrixA` and `matrixB` and returns the result as a new matrix. The main method demonstrates the usage of this method by creating two sample matrices and printing the resulting Kronecker product matrix.