matrix_multiplication.java

public class MatrixMultiplication {
    public static void main(String[] args) {
        int[][] A = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
        int[][] B = {{9, 8, 7}, {6, 5, 4}, {3, 2, 1}};
        int[][] RES = new int[3][3];

        // Perform matrix multiplication
        for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 3; j++) {
                for (int k = 0; k < 3; k++) {
                    RES[i][j] += A[i][k] * B[k][j];
                }
            }
        }

        // Print the arrays
        System.out.println("Matrix A:");
        printMatrix(A);
        System.out.println("Matrix B:");
        printMatrix(B);
        System.out.println("Result Matrix (A * B):");
        printMatrix(RES);
    }

    // Helper method to print a matrix
    public static void printMatrix(int[][] matrix) {
        for (int i = 0; i < matrix.length; i++) {
            for (int j = 0; j < matrix[i].length; j++) {
                System.out.print(matrix[i][j] + " ");
            }
            System.out.println();
        }
    }
}