Finding the entrywise difference of two matrices

Here’s an example of a Java program that finds the entrywise difference of two matrices:

   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 rows = matrix1.length;

        int cols = matrix1[0].length;

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

        // Finding the difference of matrices

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

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

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

            }

        }

       
        // Displaying the difference matrix

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

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

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

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

            }

            System.out.println();
        }
    }

}

In this example, we have two matrices: `matrix1` and `matrix2`. The program calculates the entrywise difference by subtracting the corresponding elements of `matrix2` from `matrix1`. The resulting difference matrix is stored in the `difference` array. Finally, the program displays the difference matrix.

When you run this program, the output will be:

Difference Matrix:

-8 -6 -4

-2 0 2

4 6 8

This shows the entrywise difference of `matrix1` and `matrix2`.