Let’s learn java program to multiply two matrices.
Java program to multiply two matrices

In java, to perform matrix multiplication binary operator ” * ” is used. Matrix multiplication is performed by multiplying row element of first matrix by columns of second matrix.
Also read – insertion sort java
Also first matrix column should be equal to second matrix row. Let’s see java program to perform matrix multiplication,
import java.util.Scanner; public class MatrixMultiplicationInJava { public static void main(String[] args) { int row, column, a, b, total = 0, x, y, z; Scanner sc = new Scanner(System.in); System.out.println("Please enter no. of rows and columns : "); row = sc.nextInt(); column = sc.nextInt(); int matrix1[][] = new int[row][column]; System.out.println("Please enter elements of matrix1 : "); for(x = 0; x < row; x++) { for(y = 0; y < column; y++) { matrix1[x][y] = sc.nextInt(); } } System.out.println("Please enter no. of rows and columns : "); a = sc.nextInt(); b = sc.nextInt(); if(column != a) { System.out.println("Matrices can't be multiplied!!"); } else { int matrix2[][] = new int[a][b]; int multiply[][] = new int[row][b]; System.out.println("Please enter elements of matrix2 : "); for(x = 0; x < a; x++) { for(y = 0; y < b; y++) { matrix2[x][y] = sc.nextInt(); } } for(x = 0; x < row; x++) { for(y = 0; y < b; y++) { for(z = 0; z < a; z++) { total = total + matrix1[x][z] * matrix2[z][y]; } multiply[x][y] = total; total = 0; } } System.out.println("Multiplication of matrices : "); for(x = 0; x < row; x++) { for(y = 0; y < b; y++) { System.out.print(multiply[x][y] + "\t"); } System.out.print("\n"); } } sc.close(); } }
Output:
Please enter no. of rows and columns : 3 3
Please enter elements of matrix1 :
2 4 6
8 2 4
6 8 2
Please enter no. of rows and columns : 3 3
Please enter elements of matrix2 :
1 3 5
7 9 1
3 5 7
Multiplication of matrices :
48 72 56
34 62 70
68 100 52