public class daylight {

    private String trim;
    private double trimmed;
    private double theta;
    private int trimBackInt;
    private double i;
    private double tans;
    private double answer;

    public void trim(String thetaString, double iThing) {
        trim = thetaString;
        i = iThing;
        String trimBack = trim;
        trimBack = trimBack.substring(0, trim.indexOf(','));
        trimBackInt = Integer.parseInt(trimBack);
        trim = trim.substring(trim.indexOf(',') + 1, trim.lastIndexOf('\''));
        trimmed = Integer.parseInt(trim);
        trimmed /= 60;
        theta = trimBackInt + trimmed;
        System.out.printf("theta: %.3f\n", theta);
        System.out.printf("i: %.3f\n", i);
        i = i * (Math.PI / 180);
        theta = theta * (Math.PI / 180);
        tans = Math.tan(i) * Math.tan(theta);
        answer = 24 * (1-((Math.acos(tans))/Math.PI));
        System.out.printf("Answer: %.3f", answer);
    }

}