<dependencies> <dependency> <groupId>org.jblas</groupId> <artifactId>jblas</artifactId> <version>1.2.4</version> </dependency> </dependencies> import org.jblas.DoubleMatrix; public class MatrixCalculation { public static void main(String[] args) { double[][] array = {{1.0, 2.0, 3.0}, {4.0, 5.0, 6.0}, {7.0, 8.0, 9.0}}; DoubleMatrix matrixA = new DoubleMatrix(array); DoubleMatrix matrixB = DoubleMatrix.ones(3, 3); DoubleMatrix result = matrixA.mmul(matrixB); System.out.println(result); } }