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datetime.java
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datetime.java
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import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.InputMismatchException;
import java.util.Scanner;
public class datetime {
public static void main(String[] args) {
try (Scanner sc = new Scanner(System.in)) {
int year, month, day, hour, minute, second, millisecond, microsecond, nanosecond;// initialize date and time
// variables
DateTimeFormatter era1 = DateTimeFormatter.ofPattern("GGG"); // Format the date and time values with a
// specified pattern for all supported formats
DateTimeFormatter era2 = DateTimeFormatter.ofPattern("GGGG");
DateTimeFormatter era3 = DateTimeFormatter.ofPattern("GGGGG");
DateTimeFormatter year1 = DateTimeFormatter.ofPattern("uu");
DateTimeFormatter year2 = DateTimeFormatter.ofPattern("uuuu");
DateTimeFormatter yearEra = DateTimeFormatter.ofPattern("yy");
DateTimeFormatter yearEra2 = DateTimeFormatter.ofPattern("yyyy");
DateTimeFormatter dayOfYear = DateTimeFormatter.ofPattern("D");
DateTimeFormatter monthOfYear = DateTimeFormatter.ofPattern("M");
DateTimeFormatter monthOfYear2 = DateTimeFormatter.ofPattern("MMM");
DateTimeFormatter monthOfYear3 = DateTimeFormatter.ofPattern("MMMM");
DateTimeFormatter monthOfYear4 = DateTimeFormatter.ofPattern("MMMMM");
DateTimeFormatter dayOfMonth = DateTimeFormatter.ofPattern("d");
DateTimeFormatter quarter = DateTimeFormatter.ofPattern("q");
DateTimeFormatter quarter2 = DateTimeFormatter.ofPattern("qqq");
DateTimeFormatter quarter3 = DateTimeFormatter.ofPattern("qqqq");
DateTimeFormatter weekBasedYear = DateTimeFormatter.ofPattern("YY");
DateTimeFormatter weekBasedYear2 = DateTimeFormatter.ofPattern("YYYY");
DateTimeFormatter weekOfYear = DateTimeFormatter.ofPattern("w");
DateTimeFormatter weekOfMonth = DateTimeFormatter.ofPattern("W");
DateTimeFormatter dayOfWeek = DateTimeFormatter.ofPattern("E");
DateTimeFormatter dayOfWeek2 = DateTimeFormatter.ofPattern("EEEE");
DateTimeFormatter dayOfWeek3 = DateTimeFormatter.ofPattern("EEEEE");
DateTimeFormatter localDayOfWeek = DateTimeFormatter.ofPattern("e");
DateTimeFormatter localDayOfWeek2 = DateTimeFormatter.ofPattern("eee");
DateTimeFormatter localDayOfWeek3 = DateTimeFormatter.ofPattern("eeee");
DateTimeFormatter localDayOfWeek4 = DateTimeFormatter.ofPattern("eeeee");
DateTimeFormatter localWeekOfMonth = DateTimeFormatter.ofPattern("F");
DateTimeFormatter amPm = DateTimeFormatter.ofPattern("a");
DateTimeFormatter hour12 = DateTimeFormatter.ofPattern("h");
DateTimeFormatter hour0To11 = DateTimeFormatter.ofPattern("K");
DateTimeFormatter hour24 = DateTimeFormatter.ofPattern("k");
DateTimeFormatter hourOfDay = DateTimeFormatter.ofPattern("H");
DateTimeFormatter minute1 = DateTimeFormatter.ofPattern("m");
DateTimeFormatter second1 = DateTimeFormatter.ofPattern("s");
DateTimeFormatter fractionOfSecond = DateTimeFormatter.ofPattern("SSSSSSSSS");
DateTimeFormatter millisecondOfDay = DateTimeFormatter.ofPattern("A");
DateTimeFormatter nanosecondOfSecond = DateTimeFormatter.ofPattern("n");
DateTimeFormatter nanosecondOfDay = DateTimeFormatter.ofPattern("N");
DateTimeFormatter timezoneId = DateTimeFormatter.ofPattern("VV");
DateTimeFormatter timezoneName = DateTimeFormatter.ofPattern("z");
DateTimeFormatter timezoneName2 = DateTimeFormatter.ofPattern("zzzz");
DateTimeFormatter timezoneOffset = DateTimeFormatter.ofPattern("OOOO");
DateTimeFormatter timezoneOffsetZ = DateTimeFormatter.ofPattern("XXXXX");
DateTimeFormatter timezoneOffsetX = DateTimeFormatter.ofPattern("xxxxx");
DateTimeFormatter timezoneOffset2 = DateTimeFormatter.ofPattern("ZZZZZ");
DateTimeFormatter timezoneOffsetZ1 = DateTimeFormatter.ofPattern("ZZZZ");
try {// make sure date and time input is a vaild integer
System.out.print("Year: ");
year = sc.nextInt();
System.out.print("Month: ");
month = sc.nextInt();// 1 is January
System.out.print("Day: ");
day = sc.nextInt();
System.out.print("Hour: ");
hour = sc.nextInt();
System.out.print("Minute: ");
minute = sc.nextInt();
System.out.print("Second: ");
second = sc.nextInt();
System.out.print("Millisecond: ");
millisecond = sc.nextInt();
System.out.print("Microsecond: ");
microsecond = sc.nextInt();
System.out.print("Nanosecond: ");
nanosecond = sc.nextInt();
LocalDateTime enteredDateAndTime = LocalDateTime.of(year, month, day, hour, minute, second)
.withNano(millisecond * 1000000 + microsecond * 1000 + nanosecond); // Convert datetime of
// GregorianCalendar object
// to LocalDateTime object
// named enteredDateAndTime
// without a time zone and
// set nanoseconds to
// 1,000,000 (1 million) *
// milliseconds + 1,000 (1
// thousand) * microseconds
// + nanoseconds
ZonedDateTime enteredDateAndTimeTimezone = ZonedDateTime.of(enteredDateAndTime, ZoneId.systemDefault());// Get
// time
// zone
// of
// entered
// date
// and
// time
// values
// Print the entered date and time values in all supported formats
System.out.println("\nEntered Date and Time Values:\n");
System.out.println("Era: " + era1.format(enteredDateAndTime) + " (" + era2.format(enteredDateAndTime)
+ ")" + " (" + era3.format(enteredDateAndTime) + ")"); // Print the date and time values with
// formatted date and time pattern
System.out.println(
"Year: " + year1.format(enteredDateAndTime) + " (" + year2.format(enteredDateAndTime) + ")");
System.out.println("Era Year: " + yearEra.format(enteredDateAndTime) + " ("
+ yearEra2.format(enteredDateAndTime) + ")");
System.out.println("Day of Year: " + dayOfYear.format(enteredDateAndTime));
System.out.println("Month of Year: " + monthOfYear.format(enteredDateAndTime) + " ("
+ monthOfYear2.format(enteredDateAndTime) + ")" + " (" + monthOfYear3.format(enteredDateAndTime)
+ ")" + " (" + monthOfYear4.format(enteredDateAndTime) + ")");
System.out.println("Day of Month: " + dayOfMonth.format(enteredDateAndTime));
System.out.println("Quarter: " + quarter.format(enteredDateAndTime) + " ("
+ quarter2.format(enteredDateAndTime) + ")" + " (" + quarter3.format(enteredDateAndTime) + ")");
System.out.println("ISO Week-based Year: " + weekBasedYear.format(enteredDateAndTime) + " ("
+ weekBasedYear2.format(enteredDateAndTime) + ")");
System.out.println("Week of Year: " + weekOfYear.format(enteredDateAndTime));
System.out.println("Week of Month: " + weekOfMonth.format(enteredDateAndTime));
System.out.println("Day of Week: " + dayOfWeek.format(enteredDateAndTime) + " ("
+ dayOfWeek2.format(enteredDateAndTime) + ")" + " (" + dayOfWeek3.format(enteredDateAndTime)
+ ")");
System.out.println("Local Day of Week: " + localDayOfWeek.format(enteredDateAndTime) + " ("
+ localDayOfWeek2.format(enteredDateAndTime) + ")" + " ("
+ localDayOfWeek3.format(enteredDateAndTime) + ")" + " ("
+ localDayOfWeek4.format(enteredDateAndTime) + ")");
System.out.println("Local Week of Month: " + localWeekOfMonth.format(enteredDateAndTime));
System.out.println("AM/PM: " + amPm.format(enteredDateAndTime));
System.out.println("12 Hour Format " + hour12.format(enteredDateAndTime));
System.out.println("0-11 Hour Format: " + hour0To11.format(enteredDateAndTime));
System.out.println("24 Hour Format: " + hour24.format(enteredDateAndTime));
System.out.println("Hour of Day: " + hourOfDay.format(enteredDateAndTime));
System.out.println("Minute: " + minute1.format(enteredDateAndTime));
System.out.println("Second: " + second1.format(enteredDateAndTime));
System.out.println("Fraction of Second: " + fractionOfSecond.format(enteredDateAndTime));
System.out.println("Millisecond of Day: " + millisecondOfDay.format(enteredDateAndTime));
System.out.println("Nanosecond: " + nanosecondOfSecond.format(enteredDateAndTime));
System.out.println("Nanosecond of Day: " + nanosecondOfDay.format(enteredDateAndTime));
System.out.println("Time Zone ID: " + timezoneId.format(enteredDateAndTimeTimezone));
System.out.println("Time Zone: " + timezoneName2.format(enteredDateAndTimeTimezone) + " ("
+ timezoneName.format(enteredDateAndTimeTimezone) + ")");
System.out.println("Localized Time Zone Offset: " + timezoneOffset.format(enteredDateAndTimeTimezone)
+ " (" + timezoneOffset2.format(enteredDateAndTimeTimezone) + ")");
System.out.println("Time Zone Offset: " + timezoneOffsetZ.format(enteredDateAndTimeTimezone) + " ("
+ timezoneOffsetX.format(enteredDateAndTimeTimezone) + ")" + " ("
+ timezoneOffsetZ1.format(enteredDateAndTimeTimezone) + ")");
System.out.println("\nCurrent Date and Time Values:\n");
} catch (InputMismatchException ex) {// if entered, date and time values are in the wrong format (not a
// valid integer)
System.out.println("\nInvalid date and time input.\nPrinting current date and time.\n");// print the
// error
}
// Print the current date and time values in all supported formats
ZonedDateTime dateAndTimeNow = ZonedDateTime.now(); // Get the current date and time based on local computer
// date and time with local time zone
System.out.println("Current Era: " + era1.format(dateAndTimeNow) + " (" + era2.format(dateAndTimeNow) + ")"
+ " (" + era3.format(dateAndTimeNow) + ")"); // Print the formatted date and time values in current
// local date and time
System.out.println(
"Current Year: " + year1.format(dateAndTimeNow) + " (" + year2.format(dateAndTimeNow) + ")");
System.out.println("Current Era Year: " + yearEra.format(dateAndTimeNow) + " ("
+ yearEra2.format(dateAndTimeNow) + ")");
System.out.println("Current Day of Year: " + dayOfYear.format(dateAndTimeNow));
System.out.println("Current Month of Year: " + monthOfYear.format(dateAndTimeNow) + " ("
+ monthOfYear2.format(dateAndTimeNow) + ")" + " (" + monthOfYear3.format(dateAndTimeNow) + ")"
+ " (" + monthOfYear4.format(dateAndTimeNow) + ")");
System.out.println("Current Day of Month: " + dayOfMonth.format(dateAndTimeNow));
System.out.println("Current Quarter: " + quarter.format(dateAndTimeNow) + " ("
+ quarter2.format(dateAndTimeNow) + ")" + " (" + quarter3.format(dateAndTimeNow) + ")");
System.out.println("Current ISO Week-based Year: " + weekBasedYear.format(dateAndTimeNow) + " ("
+ weekBasedYear2.format(dateAndTimeNow) + ")");
System.out.println("Current Week of Year: " + weekOfYear.format(dateAndTimeNow));
System.out.println("Current Week of Month: " + weekOfMonth.format(dateAndTimeNow));
System.out.println("Current Day of Week: " + dayOfWeek.format(dateAndTimeNow) + " ("
+ dayOfWeek2.format(dateAndTimeNow) + ")" + " (" + dayOfWeek3.format(dateAndTimeNow) + ")");
System.out.println("Current Local Day of Week: " + localDayOfWeek.format(dateAndTimeNow) + " ("
+ localDayOfWeek2.format(dateAndTimeNow) + ")" + " (" + localDayOfWeek3.format(dateAndTimeNow) + ")"
+ " (" + localDayOfWeek4.format(dateAndTimeNow) + ")");
System.out.println("Current Local Week of Month: " + localWeekOfMonth.format(dateAndTimeNow));
System.out.println("Current AM/PM: " + amPm.format(dateAndTimeNow));
System.out.println("Current 12 Hour Format " + hour12.format(dateAndTimeNow));
System.out.println("Current 0-11 Hour Format: " + hour0To11.format(dateAndTimeNow));
System.out.println("Current 24 Hour Format: " + hour24.format(dateAndTimeNow));
System.out.println("Current Hour of Day: " + hourOfDay.format(dateAndTimeNow));
System.out.println("Current Minute: " + minute1.format(dateAndTimeNow));
System.out.println("Current Second: " + second1.format(dateAndTimeNow));
System.out.println("Current Fraction of Second: " + fractionOfSecond.format(dateAndTimeNow));
System.out.println("Current Millisecond of Day: " + millisecondOfDay.format(dateAndTimeNow));
System.out.println("Current Nanosecond: " + nanosecondOfSecond.format(dateAndTimeNow));
System.out.println("Current Nanosecond of Day: " + nanosecondOfDay.format(dateAndTimeNow));
System.out.println("Current Time Zone ID: " + timezoneId.format(dateAndTimeNow));
System.out.println("Current Time Zone: " + timezoneName2.format(dateAndTimeNow) + " ("
+ timezoneName.format(dateAndTimeNow) + ")");
System.out.println("Current Localized Time Zone Offset: " + timezoneOffset.format(dateAndTimeNow) + " ("
+ timezoneOffset2.format(dateAndTimeNow) + ")");
System.out.println("Current Time Zone Offset: " + timezoneOffsetZ.format(dateAndTimeNow) + " ("
+ timezoneOffsetX.format(dateAndTimeNow) + ")" + " (" + timezoneOffsetZ1.format(dateAndTimeNow)
+ ")");
Instant currentUtcDateAndTime = Instant.now();// Get the current UTC date and time using an Instant object
LocalDateTime utcDateAndTimeNow = LocalDateTime.ofInstant(currentUtcDateAndTime, ZoneOffset.UTC);// Convert
// from an
// Instant
// object
// to
// LocalDateTime
// object
System.out.println("Current UTC Era: " + era1.format(utcDateAndTimeNow) + " ("
+ era2.format(utcDateAndTimeNow) + ")" + " (" + era3.format(utcDateAndTimeNow) + ")"); // Print the
// formatted
// date and
// time
// values in
// current
// local date
// and time
System.out.println("Current UTC Year: " + year1.format(utcDateAndTimeNow) + " ("
+ year2.format(utcDateAndTimeNow) + ")");
System.out.println("Current UTC Era Year: " + yearEra.format(utcDateAndTimeNow) + " ("
+ yearEra2.format(utcDateAndTimeNow) + ")");
System.out.println("Current UTC Day of Year: " + dayOfYear.format(utcDateAndTimeNow));
System.out.println("Current UTC Month of Year: " + monthOfYear.format(utcDateAndTimeNow) + " ("
+ monthOfYear2.format(utcDateAndTimeNow) + ")" + " (" + monthOfYear3.format(utcDateAndTimeNow) + ")"
+ " (" + monthOfYear4.format(utcDateAndTimeNow) + ")");
System.out.println("Current UTC Day of Month: " + dayOfMonth.format(utcDateAndTimeNow));
System.out.println("Current UTC Quarter: " + quarter.format(utcDateAndTimeNow) + " ("
+ quarter2.format(utcDateAndTimeNow) + ")" + " (" + quarter3.format(utcDateAndTimeNow) + ")");
System.out.println("Current UTC ISO Week-based Year: " + weekBasedYear.format(utcDateAndTimeNow) + " ("
+ weekBasedYear2.format(utcDateAndTimeNow) + ")");
System.out.println("Current UTC Week of Year: " + weekOfYear.format(utcDateAndTimeNow));
System.out.println("Current UTC Week of Month: " + weekOfMonth.format(utcDateAndTimeNow));
System.out.println("Current UTC Day of Week: " + dayOfWeek.format(utcDateAndTimeNow) + " ("
+ dayOfWeek2.format(utcDateAndTimeNow) + ")" + " (" + dayOfWeek3.format(utcDateAndTimeNow) + ")");
System.out.println("Current UTC Local Day of Week: " + localDayOfWeek.format(utcDateAndTimeNow) + " ("
+ localDayOfWeek2.format(utcDateAndTimeNow) + ")" + " (" + localDayOfWeek3.format(utcDateAndTimeNow)
+ ")" + " (" + localDayOfWeek4.format(utcDateAndTimeNow) + ")");
System.out.println("Current UTC Local Week of Month: " + localWeekOfMonth.format(utcDateAndTimeNow));
System.out.println("Current UTC AM/PM: " + amPm.format(utcDateAndTimeNow));
System.out.println("Current UTC 12 Hour Format " + hour12.format(utcDateAndTimeNow));
System.out.println("Current UTC 0-11 Hour Format: " + hour0To11.format(utcDateAndTimeNow));
System.out.println("Current UTC 24 Hour Format: " + hour24.format(utcDateAndTimeNow));
System.out.println("Current UTC Hour of Day: " + hourOfDay.format(utcDateAndTimeNow));
System.out.println("Current UTC Minute: " + minute1.format(utcDateAndTimeNow));
System.out.println("Current UTC Second: " + second1.format(utcDateAndTimeNow));
System.out.println("Current UTC Fraction of Second: " + fractionOfSecond.format(utcDateAndTimeNow));
System.out.println("Current UTC Millisecond of Day: " + millisecondOfDay.format(utcDateAndTimeNow));
System.out.println("Current UTC Nanosecond: " + nanosecondOfSecond.format(utcDateAndTimeNow));
System.out.println("Current UTC Nanosecond of Day: " + nanosecondOfDay.format(utcDateAndTimeNow));
}
}
}