In this tutorial, we will see “Program to Multiply two matrices using Java 8 Streams?”
program to multiply two matrices using Java 8 Stream
Java 8 – Program to Multiply Two Matrices? (Simplest Example) Share on X
import java.util.stream.IntStream;
/**
* Using Java 8, Find the Multiplication of Two Matrices
* @author Deepak Verma
*
*/
public class Program_to_Find_Multiplication_of_Two_Matrices_Java8_Example {
public static void main(String[] args) {
int matrix1[][]={{1,1,1},{2,2,2},{3,3,3}};
int matrix2[][]={{1,1,1},{2,2,2},{3,3,3}};
int rows1 = matrix1.length;
int cols1 = matrix1[0].length;
int rows2 = matrix2.length;
int cols2 = matrix2[0].length;
if (cols1 != rows2) {
throw new IllegalArgumentException("Matrices can't be multiplied: " + cols1 + " != " + rows2);
}
int[][] result = new int[rows1][cols2];
IntStream.range(0, rows1).parallel().forEach(i ->
IntStream.range(0, cols2).parallel().forEach(j ->
result[i][j] = IntStream.range(0, cols1).parallel()
.map(k -> matrix1[i][k] * matrix2[k][j])
.sum()));
for (int[] row : result) {
for (int value : row) {
System.out.print(value + " ");
}
System.out.println();
}
}
}
Output:
6 6 6 12 12 12 18 18 18
program to multiply two matrices using Java 8 Stream
Java 8 – Program to Multiply Two Matrices? (Simplest Example) Share on X
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