Write a java program to printing matrices, and performing matrix Addition, Subtraction, Multiplication and Division.

 

Write a java program to printing matrices, and performing matrix Addition, Subtraction, Multiplication and Division.

Save this file to MatrixOperations.java

Run it and enjoy

import java.util.Scanner;

public class MatrixOperations {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        System.out.print("Enter the number of rows for Matrix A: ");

        int rowsA = scanner.nextInt();

        System.out.print("Enter the number of columns for Matrix A: ");

        int colsA = scanner.nextInt();

        System.out.print("Enter the number of rows for Matrix B: ");

        int rowsB = scanner.nextInt();

        System.out.print("Enter the number of columns for Matrix B: ");

        int colsB = scanner.nextInt();

        if (colsA != rowsB) {

            System.out.println("Matrix multiplication is not possible. Columns of Matrix A must be equal to rows of Matrix B.");

            scanner.close();

            return;

        }

        int[][] matrixA = new int[rowsA][colsA];

        int[][] matrixB = new int[rowsB][colsB];

        System.out.println("Enter elements of Matrix A:");

        inputMatrixElements(scanner, matrixA);

        System.out.println("Enter elements of Matrix B:");

        inputMatrixElements(scanner, matrixB);

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

        printMatrix(matrixA);

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

        printMatrix(matrixB);

        int[][] resultAddition = addMatrices(matrixA, matrixB);

        int[][] resultSubtraction = subtractMatrices(matrixA, matrixB);

        int[][] resultMultiplication = multiplyMatrices(matrixA, matrixB);

        System.out.println("Matrix A + Matrix B:");

        printMatrix(resultAddition);

        System.out.println("Matrix A - Matrix B:");

        printMatrix(resultSubtraction);

        System.out.println("Matrix A * Matrix B:");

        printMatrix(resultMultiplication);

        scanner.close();

    }

    // Method to input elements of a matrix

    public static void inputMatrixElements(Scanner scanner, int[][] matrix) {

        for (int i = 0; i < matrix.length; i++) {

            for (int j = 0; j < matrix[0].length; j++) {

                matrix[i][j] = scanner.nextInt();

            }

        }

    }

    // Method to print a matrix

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

        for (int[] row : matrix) {

            for (int num : row) {

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

            }

            System.out.println();

        }

    }

    // Method to add two matrices

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

        int rows = matrixA.length;

        int cols = matrixA[0].length;

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

        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 subtract two matrices

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

        int rows = matrixA.length;

        int cols = matrixA[0].length;

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

        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 multiply two matrices

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

        int rowsA = matrixA.length;

        int colsA = matrixA[0].length;

        int colsB = matrixB[0].length;

        int[][] result = new int[rowsA][colsB];

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

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

                int sum = 0;

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

                    sum += matrixA[i][k] * matrixB[k][j];

                }

                result[i][j] = sum;

            }

        }

        return result;

    }

}