Finding the matrix entrywise difference using element-wise subtraction.

Here’s a Java program that calculates the element-wise difference between two matrices using subtraction:

public class MatrixDifference {

    public static void main(String[] args) {

        int[][] matrix1 = {

            {1, 2, 3},

            {4, 5, 6},

            {7, 8, 9}

        };

        int[][] matrix2 = {

            {9, 8, 7},

            {6, 5, 4},

            {3, 2, 1}

        };

        int[][] difference = calculateMatrixDifference(matrix1, matrix2);

        // Print the resulting difference matrix

        System.out.println("Matrix Difference:");

        printMatrix(difference);

    }

    public static int[][] calculateMatrixDifference(int[][] matrix1, int[][] matrix2) {

        int rows = matrix1.length;

        int columns = matrix1[0].length;

        int[][] difference = new int[rows][columns];

        // Calculate the element-wise difference using subtraction

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

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

                difference[i][j] = matrix1[i][j] - matrix2[i][j];

            }

        }

        return difference;

    }

    public static void printMatrix(int[][] matrix) {

        int rows = matrix.length;

        int columns = matrix[0].length;

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

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

                System.out.print(matrix[i][j] + " ");

            }

            System.out.println();

        }

    }

}

In this program, we have two matrices `matrix1` and `matrix2` with the same dimensions. The method `calculateMatrixDifference` takes these two matrices as inputs and returns the resulting difference matrix. It subtracts each corresponding element from `matrix1` and `matrix2` and stores the result in the `difference` matrix.

Finally, the program prints the resulting difference matrix using the `printMatrix` method.