[Java] Calculate your age in days

LiveDays.java

import java.util.Calendar;
import java.util.Date;

public class LiveDays {
    public static void main(String[] args) {
        Calendar cal = Calendar.getInstance();
        Date today = cal.getTime();
        cal.set(1985, Calendar.JANUARY, 30);
        Date birthday = cal.getTime();

        long dateSubtract = today.getTime() - birthday.getTime();
        long time = 1000 * 60 * 60 * 24;
        System.out.println("我已經活了 " + dateSubtract / time + " 天");
    }
}

Thanks, Worked :)