<dependencies> <dependency> <groupId>org.jblas</groupId> <artifactId>jblas</artifactId> <version>1.2.4</version> </dependency> </dependencies> import org.jblas.DoubleMatrix; public class MatrixOperations { public static void main(String[] args) { DoubleMatrix A = new DoubleMatrix(new double[][]{{1, 2}, {3, 4}}); DoubleMatrix B = new DoubleMatrix(new double[][]{{5, 6}, {7, 8}}); DoubleMatrix C = A.add(B); System.out.println(C); DoubleMatrix D = A.mmul(B); System.out.println(D); } }