weather station

import java.text.*;
import java.util.*;
import java.util.concurrent.TimeUnit;
//Prereshena - @author: Emilija Gjorgjevska, 2015

public class WeatherStationTest {
    public static void main(String[] args) throws ParseException {
        Scanner scanner = new Scanner(System.in);
        DateFormat df = new SimpleDateFormat("dd.MM.yyyy HH:mm:ss");
        int n = scanner.nextInt();
        scanner.nextLine();
        WeatherStation ws = new WeatherStation(n);
        while (true) {
            String line = scanner.nextLine();
            if (line.equals("=====")) {
                break;
            }
            String[] parts = line.split(" ");
            float temp = Float.parseFloat(parts[0]);
            float wind = Float.parseFloat(parts[1]);
            float hum = Float.parseFloat(parts[2]);
            float vis = Float.parseFloat(parts[3]);
            line = scanner.nextLine();
            Date date = df.parse(line);
            ws.addMeasurment(temp, wind, hum, vis, date);
        }
        String line = scanner.nextLine();
        Date from = df.parse(line);
        line = scanner.nextLine();
        Date to = df.parse(line);
        scanner.close();
        System.out.println(ws.total());
        try {
            ws.status(from, to);
        } catch (RuntimeException e) {
            System.out.println(e);
        }
    }
}
// vashiot kod ovde
class Data implements Comparable<Data> {

    private float humidity;
    private float wind;
    private float visibility;
    float temperature;
    Date time;

    public Data(float temperature, float humidity, float wind,
            float visibility, Date time) {
        this.temperature = temperature;
        this.humidity = humidity;
        this.wind = wind;
        this.visibility = visibility;
        this.time = time;
    }

    public boolean checkMinutes(Date d) {
        if (Double.compare(
                TimeUnit.MILLISECONDS.toMinutes(d.getTime() - time.getTime()),
                2.5) < 0)
            return true;
        else
            return false;
    }

    public boolean checkDays(Date d, int days) {
        long result = Long.compare(d.getTime() - time.getTime(),
                TimeUnit.DAYS.toMillis(days));
        if (result >= 0)
            return true;
        else
            return false;
    }

    @Override
    public int compareTo(Data o) {
        return time.compareTo(o.time);
    }

    public String toString() {
        return String.format("%.1f %.1f km/h %.1f%% %.1f km %s\n", temperature, wind, humidity, visibility, time.toString());
    }
}

class WeatherStation {
    private int days;
    private int total;
    private ArrayList<Data> datas;

    public WeatherStation(int days) {
        this.days = days;
        this.total = 0;
        this.datas = new ArrayList<Data>();
    }

    public void addMeasurment(float temperature, float wind, float humidity,
            float visibility, Date time) {
        for (int i = 0; i < datas.size(); i++)
            if (datas.get(i).checkMinutes(time))
                return;
        datas.add(new Data(temperature, humidity, wind, visibility, time));
        total++;
        for (int i = 0; i < datas.size(); i++) {
            if (datas.get(i).checkDays(time, days)) {
                datas.remove(i);
                i--;
                total--;
            }
        }

    }

    public int total() {
        return total;
    }

    public void status(Date from, Date to) {
        Collections.sort(datas);
        float average = 0;
        int counter = 0, numelements = 0;
        StringBuilder s = new StringBuilder();
        for (int i = 0; i < datas.size(); i++) {
            if (datas.get(i).time.equals(from) || datas.get(i).time.after(from)
                    || datas.get(i).time.equals(to)) {
                average += datas.get(i).temperature;
                s.append(datas.get(i).toString());
                numelements++;
                if (datas.get(i).time.equals(from)
                        || datas.get(i).time.equals(to))
                    counter++;

                if (datas.get(i).time.equals(to))
                    break;
            }
        }
        if (counter == 0 || from.after(to))
            throw new RuntimeException();
        s.append(String.format("Average temperature: %.2f", average / numelements));
        System.out.println(s.toString());
    }
}