Нужно исправить код АБСОЛЮТНОМУ профану

/*
    Equation of Time calculation
    *** No guarantees are implied. Use at your own risk ***
 
    Written by Del Smith, 2016-11-29
 
    Based on "Equation of time" WikiPedia article as of 2016-11-28
    (which describes angles in a bewildering mixture of degrees and radians)
 
    It appears to give a good result, but I make no claims for accuracy.
*/
// constants  (all angles as radians)
private static final Double pi = atan(1.0)*4;             // tan(pi/4) = 1  (45 degrees)
private static final Double lambda = 23.44 * pi / 180;    // Earth's inclination in radians
private static final Double omega = 2*pi/365.25;          // angular velocity of annual revolution (radians/day)
 
// calculate the Equation of Time from 'day of year'
private static Double EqnOfTime(int day_number) {
    // the result is in seconds
    // add to the Mean Solar Time  (UTC + Longitude*240 sec.) to get Apparent Solar Time
    // D                                                          day of the year
    // A = W*(D+10)                                               angle of revolution (circular)
    // B = A + 0.0333*sin(W*(D-2))                                angle of revolution (elliptical)
    // C = ( A - atan[  tan(B) / cos (inclination) ] ) / 'pi'     angular correction
    // EOT = 43200 × (C − int(C+0.5))                             Equation of Time in seconds
    Double delta = Integer.valueOf(day_number).doubleValue();
    Double alpha = omega*((delta+10)%365);                              // angle in (mean) circular orbit, solar year starts 21. Dec
    Double beta = alpha + 0.0333*sin(omega*((delta-2)%365));            // angle in elliptical orbit, from perigee 3. Jan (radians)
    Double gamma = ( alpha - atan( tan(beta) / cos(lambda))) / pi;      // angular correction
    return (43200. * (gamma - Double.valueOf(gamma+0.5).intValue()));   // equation of time in seconds
}

import java.util.Scanner;
 
public class EOT {
    
 
    /*
        Equation of Time calculation
        *** No guarantees are implied. Use at your own risk ***
 
        Written by Del Smith, 2016-11-29
 
        Based on "Equation of time" WikiPedia article as of 2016-11-28
        (which describes angles in a bewildering mixture of degrees and radians)
 
        It appears to give a good result, but I make no claims for accuracy.
    */
// constants  (all angles as radians)
    private static final Double pi = Math.atan(1.0) * 4;             // tan(pi/4) = 1  (45 degrees)
    private static final Double lambda = 23.44 * pi / 180;    // Earth's inclination in radians
    private static final Double omega = 2 * pi / 365.25;          // angular velocity of annual revolution (radians/day)
 
    // calculate the Equation of Time from 'day of year'
    private static Double EqnOfTime(int day_number) {
        // the result is in seconds
        // add to the Mean Solar Time  (UTC + Longitude*240 sec.) to get Apparent Solar Time
        // D                                                          day of the year
        // A = W*(D+10)                                               angle of revolution (circular)
        // B = A + 0.0333*sin(W*(D-2))                                angle of revolution (elliptical)
        // C = ( A - atan[  tan(B) / cos (inclination) ] ) / 'pi'     angular correction
        // EOT = 43200 Г— (C в€’ int(C+0.5))                             Equation of Time in seconds
        Double delta = Integer.valueOf(day_number).doubleValue();
        Double alpha = omega * ((delta + 10) % 365);                              // angle in (mean) circular orbit, solar year starts 21. Dec
        Double beta = alpha + 0.0333 * Math.sin(omega * ((delta - 2) % 365));            // angle in elliptical orbit, from perigee 3. Jan (radians)
        Double gamma = (alpha - Math.atan(Math.tan(beta) / Math.cos(lambda))) / pi;      // angular correction
        return (43200. * (gamma - Double.valueOf(gamma + 0.5).intValue()));   // equation of time in seconds
    }
 
    public static void main(String[] args) {
        System.out.println("Please enter day number :");
        int day = Integer.valueOf(new Scanner(System.in).next());
        System.out.println("EqnOfTime: " + EqnOfTime(day));
 
    }
}