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Multiplication of two Matrices using Java
Matrix multiplication leads to a new matrix by multiplying 2 matrices. But this is only possible if the columns of the first matrix are equal to the rows of the second matrix. An example of matrix multiplication with square matrices is given as follows.
Example
public class Example {
public static void main(String args[]) {
int n = 3;
int[][] a = { {5, 2, 3}, {2, 6, 3}, {6, 9, 1} };
int[][] b = { {2, 7, 5}, {1, 4, 3}, {1, 2, 1} };
int[][] c = new int[n][n];
System.out.println("Matrix A:");
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
System.out.print(a[i][j] + " ");
}
System.out.println();
}
System.out.println("Matrix B:");
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
System.out.print(b[i][j] + " ");
}
System.out.println();
}
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++){
for (int k = 0; k < n; k++) {
c[i][j] = c[i][j] + a[i][k] * b[k][j];
}
}
}
System.out.println("The product of two matrices is:");
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
System.out.print(c[i][j] + " ");
}
System.out.println();
}
}
}Output
Matrix A: 5 2 3 2 6 3 6 9 1 Matrix B: 2 7 5 1 4 3 1 2 1 The product of two matrices is: 15 49 34 13 44 31 22 80 58
Updated on: 26-Jun-2020
4K+ Views
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