Java Program to multiply 2 Matrices

by Online Tutorials Library July 22, 2022

Java Program to multiply two matrices

We can multiply two matrices in java using binary * operator and executing another loop. A matrix is also known as array of arrays. We can add, subtract and multiply matrices.

In case of matrix multiplication, one row element of first matrix is multiplied by all columns of second matrix.

Matrix Multiplication in Java

Let’s see a simple example to multiply two matrices of 3 rows and 3 columns.

 public class MatrixMultiplicationExample{ public static void main(String args[]){ //creating two matrices   int a[][]={{1,1,1},{2,2,2},{3,3,3}};   int b[][]={{1,1,1},{2,2,2},{3,3,3}};      //creating another matrix to store the multiplication of two matrices   int c[][]=new int[3][3];  //3 rows and 3 columns    //multiplying and printing multiplication of 2 matrices   for(int i=0;i<3;i++){   for(int j=0;j<3;j++){   c[i][j]=0;     for(int k=0;k<3;k++)     {     c[i][j]+=a[i][k]*b[k][j];     }//end of k loop System.out.print(c[i][j]+” “);  //printing matrix element }//end of j loop System.out.println();//new line   }   }} 

Test it Now

Output:

6 6 6  12 12 12  18 18 18

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