Example: Matrix Addition in Java in Java

// Matrix Addition in Java
public class Main {

    // Method to add two matrices
    public static int[][] addMatrices(int[][] matrixA, int[][] matrixB) {
        // Step 1: Get dimensions of the matrices
        int rows = matrixA.length;
        int cols = matrixA[0].length;

        // Step 2: Create a result matrix with the same dimensions
        int[][] result = new int[rows][cols];

        // Step 3: Iterate through each element and add corresponding values
        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < cols; j++) {
                result[i][j] = matrixA[i][j] + matrixB[i][j];
            }
        }
        return result;
    }

    // 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[0].length; j++) {
                System.out.print(matrix[i][j] + " ");
            }
            System.out.println();
        }
    }

    public static void main(String[] args) {
        // Step 1: Define two matrices for addition
        int[][] matrixA = {
            {1, 2, 3},
            {4, 5, 6},
            {7, 8, 9}
        };

        int[][] matrixB = {
            {9, 8, 7},
            {6, 5, 4},
            {3, 2, 1}
        };

        System.out.println("Matrix A:");
        printMatrix(matrixA);
        System.out.println("\nMatrix B:");
        printMatrix(matrixB);

        // Step 2: Perform matrix addition
        // Ensure matrices have compatible dimensions (same rows and columns)
        if (matrixA.length != matrixB.length || matrixA[0].length != matrixB[0].length) {
            System.out.println("Matrices dimensions are not compatible for addition.");
        } else {
            int[][] sumMatrix = addMatrices(matrixA, matrixB);

            // Step 3: Print the result
            System.out.println("\nSum of Matrix A and Matrix B:");
            printMatrix(sumMatrix);
        }
    }
}