private static double h2(double r) { return (r==0.0)?PIO4:besselJ1(PI*r)/(2.0*r); } private static double besselJ1(double x) {
private static double h2(double r) { return (r==0.0)?PIO4:besselJ1(PI*r)/(2.0*r); } private static double besselJ1(double x) {