3. Essential Java Classes 3. Date and Time Home Tasks

Сентябрь 7, 2022

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3. Essential Java Classes 3. Date and Time Home Tasks

Содержание

2. Home Tasks How old are you in days and months? What day of week is your
3. Home Task I How old are you in days and months? What day of week is
4. Home Task I public static void main(String[] args){ LocalDate currDate = LocalDate.now(); LocalDate myBirthDate = LocalDate.of(2012,
5. Home Task I long amount = myBirthDate.until(currDate, ChronoUnit.DAYS); System.out.println("I have " + amount + " days
6. Home Task I See 33a4MyBirthDate project for the full text * Victor Mozharsky
7. Home Task II Calculate Orthodox Easter and Trinity dates for the current decade * Victor Mozharsky
8. Home Task II Для определения даты Православной пасхи по старому стилю необходимо: Разделить номер года на
9. Home Task II. getEasterAndTrinity public static LocalDate[] getEasterAndTrinity(int year){ LocalDate[] ret = new LocalDate[2]; int a
10. Home Task II. getEasterAndTrinity LocalDate easter = null; if (f } else{ easter = LocalDate.of(year, 4,
11. Home Task II. Main Method public static void main(String[] args) { System.out.println(" Year Easter Date Trinity
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Слайд 2

Home Tasks
How old are you in days and months? What day

of week is your birthday?
Calculate Orthodox Easter and Trinity dates for the current decade
http://ru.wikipedia.org/wiki/%D0%90%D0%BB%D0%B3%D0%BE%D1%80%D0%B8%D1%82%D0%BC_%D0%93%D0%B0%D1%83%D1%81%D1%81%D0%B0_%D0%B2%D1%8B%D1%87%D0%B8%D1%81%D0%BB%D0%B5%D0%BD%D0%B8%D1%8F_%D0%B4%D0%B0%D1%82%D1%8B_%D0%9F%D0%B0%D1%81%D1%85%D0%B8

Victor Mozharsky

Слайд 3

Home Task I
How old are you in days and months?
What

day of week is your birthday?

Victor Mozharsky

Слайд 4

Home Task I
public static void main(String[] args){
LocalDate currDate = LocalDate.now();

LocalDate myBirthDate = LocalDate.of(2012, 11, 25);
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd.MM.yyyy");
String txt = myBirthDate.format(formatter);
System.out.println("My birth date = " + txt);

Victor Mozharsky

Слайд 5

Home Task I
long amount = myBirthDate.until(currDate, ChronoUnit.DAYS);
System.out.println("I have "

+ amount + " days old");
amount = myBirthDate.until(currDate, ChronoUnit.MONTHS);
System.out.println("I have " + amount + " months old");
amount = myBirthDate.until(currDate, ChronoUnit.YEARS);
System.out.println("I have " + amount + " years old");
DayOfWeek dof = myBirthDate.getDayOfWeek();
Locale locale = new Locale("en");
System.out.println("I was born on " + dof.getDisplayName(TextStyle.FULL, locale));
}
}

Victor Mozharsky

Слайд 6

Home Task I
See 33a4MyBirthDate project for the full text
*
Victor Mozharsky

Слайд 7

Home Task II
Calculate Orthodox Easter and Trinity dates for the current

decade

Victor Mozharsky

Слайд 8

Home Task II
Для определения даты Православной пасхи по старому стилю необходимо:
Разделить

номер года на 19 и определить остаток от деления a.
Разделить номер года на 4 и определить остаток от деления b.
Разделить номер года на 7 и определить остаток от деления c.
Разделить сумму 19a + 15 на 30 и определить остаток d.
Разделить сумму 2b + 4c + 6d + 6 на 7 и определить остаток e.
Определить сумму f = d + e.
Если f ≤ 9, то Пасха будет праздноваться 22 + f марта; если f > 9, то Пасха будет праздноваться f — 9 апреля.

Victor Mozharsky

Слайд 9

Home Task II. getEasterAndTrinity
public static LocalDate[] getEasterAndTrinity(int year){
LocalDate[] ret = new

LocalDate[2];
int a = year % 19;
int b = year % 4;
int c = year % 7;
int d = (19 * a + 15) % 30;
int e = (2 * b + 4 * c + 6 * d + 6) % 7;
int f = d + e;

Victor Mozharsky

Слайд 10

Home Task II. getEasterAndTrinity
LocalDate easter = null;
if (f <= 9) {

easter = LocalDate.of(year, 3, 22 + f);
} else{ easter = LocalDate.of(year, 4, f - 9);
}
easter = easter.plusDays(13);
ret[0] = easter;
LocalDate trinity = easter.plusWeeks(7);
ret[1] = trinity;
return ret;
}

Victor Mozharsky

Слайд 11

Home Task II. Main Method
public static void main(String[] args) {
System.out.println("

Year Easter Date Trinity Date");
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd.MM.yyyy");
for (int i = 2010; i < 2021; i++){
LocalDate[] dt = getEasterAndTrinity(i);
String easter = dt[0].format(formatter);
String trinity = dt[1].format(formatter);
System.out.format(" %1$4d %2$10s %3$10s %n", i, easter, trinity);
}
}

Victor Mozharsky

3. Essential Java Classes 3. Date and Time Home Tasks

Содержание

Home TasksHow old are you in days and months? What day

Home Task IHow old are you in days and months? What

Home Task Ipublic static void main(String[] args){ LocalDate currDate = LocalDate.now();

Home Task I long amount = myBirthDate.until(currDate, ChronoUnit.DAYS); System.out.println("I have "

Home Task ISee 33a4MyBirthDate project for the full text*Victor Mozharsky

Home Task IICalculate Orthodox Easter and Trinity dates for the current

Home Task IIДля определения даты Православной пасхи по старому стилю необходимо:Разделить

Home Task II. getEasterAndTrinitypublic static LocalDate[] getEasterAndTrinity(int year){ LocalDate[] ret = new

Home Task II. getEasterAndTrinity LocalDate easter = null; if (f <= 9) {

Home Task II. Main Methodpublic static void main(String[] args) { System.out.println("

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Home Tasks
How old are you in days and months? What day

Home Task I
How old are you in days and months?
What

Home Task I
public static void main(String[] args){
LocalDate currDate = LocalDate.now();

Home Task I
long amount = myBirthDate.until(currDate, ChronoUnit.DAYS);
System.out.println("I have "

Home Task I
See 33a4MyBirthDate project for the full text
*
Victor Mozharsky

Home Task II
Calculate Orthodox Easter and Trinity dates for the current

Home Task II
Для определения даты Православной пасхи по старому стилю необходимо:
Разделить

Home Task II. getEasterAndTrinity
public static LocalDate[] getEasterAndTrinity(int year){
LocalDate[] ret = new

Home Task II. getEasterAndTrinity
LocalDate easter = null;
if (f <= 9) {

Home Task II. Main Method
public static void main(String[] args) {
System.out.println("