final int n = 51;
final double alpha = -0.5;
final double tol = 1e-12;
final double[][] strikeNprice = pricer.price(F0, 1.0, T, true, heston, STRIKE / 2, STRIKE * 2, n, 0.2, alpha, tol);
final int nStrikes = strikeNprice.length;
final double[] k = new double[nStrikes];
final double[] price = new double[nStrikes];