2. Apache Commons Math import Jama.Matrix; public class MatrixAdditionExample { public static void main(String[] args) { double[][] array1 = {{1, 2}, {3, 4}}; double[][] array2 = {{5, 6}, {7, 8}}; Matrix matrix1 = new Matrix(array1); Matrix matrix2 = new Matrix(array2); Matrix result = matrix1.plus(matrix2); result.print(); } }