Page 353 - CITS - Computer Software Application -TT

COMPUTER SOFTWARE APPLICATION - CITS

}}
Output
2 6 8
6 8 10

Multiplication of 2 Matrices in Java
In the case of matrix multiplication, a one-row element of the first matrix is multiplied by all the columns of the
second matrix which can be understood by the image given below.

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

//Java Program to multiply two matrices
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
}
}}
Output
6 6 6
12 12 12
18 18 18

340

CITS : IT&ITES - Computer Software Application - Lesson 85 - 93