How to use format method of MonthDay Class | Java 8 Date and Time

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MonthDayDemo.java

import java.time.MonthDay;
import java.time.format.DateTimeFormatter;

public class MonthDayDemo
{

    public static void main(String[] args)
    {
        MonthDay monthDay = MonthDay.parse("--12-30");
        System.out.println(monthDay);

        /*
         * Parameters:
         *
         * pattern - the pattern to use, not null
         *
         * Returns:
         *
         * the formatter based on the pattern, not null
         *
         */
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("--MM");

        /*
         * Parameters:
         *
         * formatter - the formatter to use, not null
         *
         * Returns:the formatted month-day string, not null
         */

        String formatedValue = monthDay.format(formatter);
        System.out.println(formatedValue);
    }

}

Output

--12-30
--12

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/MonthDayDemo_format.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/MonthDayDemo_format

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/0341b02de53fb9c08ccad77af304766fda93a105/BasicJava/MonthDayDemo_format/?at=master

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How to get day and month using getDayOfMonth, getMonth methods of MonthDay Class

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https://www.youtube.com/watch?v=hNTL0nYaKKA&list=UUhwKlOVR041tngjerWxVccw

MonthDayDemo.java

import java.time.Month;
import java.time.MonthDay;

public class MonthDayDemo
{

    public static void main(String[] args)
    {
        /*
         * Returns:the current month-day using the system clock and
         * default time-zone, not null
         */
        MonthDay monthDay = MonthDay.now();
        System.out.println("monthDay = " + monthDay);

        /*
         * Returns:the day-of-month, from 1 to 31
         */
        int dayOfTheMonth = monthDay.getDayOfMonth();
        System.out.println("dayOfTheMonth = " + dayOfTheMonth);

        /*
         * Returns:the month-of-year, from 1 to 12
         */
        int monthValue = monthDay.getMonthValue();
        System.out.println("monthValue = " + monthValue);

        /*
         * Returns:the month-of-year, not null
         */
        Month month = monthDay.getMonth();
        System.out.println("month = " + month);
        System.out.println("month value = " + month.getValue());

    }

}

Output

monthDay = --01-18
dayOfTheMonth = 18
monthValue = 1
month = JANUARY
month value = 1

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/MonthDayDemo_getmonth_day.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/MonthDayDemo_getmonth_day

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/0341b02de53fb9c08ccad77af304766fda93a105/BasicJava/MonthDayDemo_getmonth_day/?at=master

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Java 8 MonthDay Class | Java 8 Date and Time | Java Date and Time - Playlist

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How to form LocalDate using atYear method of MonthDay Class | Java 8 Date and Time

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https://www.youtube.com/watch?v=ERSb3DLZbv0&list=UUhwKlOVR041tngjerWxVccw

MonthDayDemo.java

import java.time.LocalDate;
import java.time.MonthDay;

public class MonthDayDemo
{

    public static void main(String[] args)
    {
        MonthDay monthDay = MonthDay.now();
        System.out.println(monthDay);

        /*
         * Parameters:
         *
         * year - the year to use, from MIN_YEAR to MAX_YEAR
         *
         * Returns:
         *
         * the local date formed from this month-day and the
         * specified year, not null
         */
        LocalDate localDate = monthDay.atYear(2013);
        System.out.println(localDate);
    }
}

Output

--01-18
2013-01-18

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/MonthDayDemo_atYear.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/MonthDayDemo_atYear

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/8fa516d67356209c67bf6743dfb7e718c4c9e5f6/BasicJava/MonthDayDemo_atYear/?at=master

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Java 8 MonthDay Class Introduction | Java 8 Date and Time | Java Date and Time

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Click the below Image to Enlarge

Java 8 MonthDay Class Introduction | Java 8 Date and Time | Java Date and Time

MonthDayDemo.java

import java.time.MonthDay;

public class MonthDayDemo
{

    public static void main(String[] args)
    {

        /*
         * Returns:
         *
         * the current month-day using the system clock and
         * default time-zone, not null
         */
        MonthDay currentMonthDay = MonthDay.now();
        System.out.println(currentMonthDay);

        /*
         * Parameters:
         *
         * text - the text to parse such as "--12-03", not null
         *
         * Returns:
         *
         * the parsed month-day, not null
         */

        MonthDay monthDay = MonthDay.parse("--03-30");
        System.out.println(monthDay);
    }

}

Output

--01-18
--03-30

Refer: 
https://docs.oracle.com/javase/8/docs/api/index.html?java/time/MonthDay.html

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/MonthDayDemo_Intro.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/MonthDayDemo_Intro

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/8fa516d67356209c67bf6743dfb7e718c4c9e5f6/BasicJava/MonthDayDemo_Intro/?at=master

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How to use format method which accepts DateTimeFormatter | LocalDateTime Class

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https://www.youtube.com/watch?v=20G9aj1r7NE&list=UUhwKlOVR041tngjerWxVccw

LocalDateTimeDemo.java

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class LocalDateTimeDemo
{

    public static void main(String[] args)
    {
        LocalDateTime localDateTime = LocalDateTime.now();
        System.out.println("Before Formatting = " + localDateTime);

        /*
         * Parameters:
         *
         * pattern - the pattern to use, not null
         *
         * Returns:
         *
         * the formatter based on the pattern, not null
         *
         */

        DateTimeFormatter dateTimeFormatter = DateTimeFormatter
                .ofPattern("dd-MM-yyyy HH:mm:ss");

        /*
         * Parameters:
         *
         * formatter - the formatter to use, not null
         *
         * Returns:
         *
         * the formatted date-time string, not null
         *
         */
        String formatDateTime = localDateTime.format(dateTimeFormatter);
        System.out.println("After Formatting  = " + formatDateTime);
    }

}

Output

Before Formatting = 2018-01-17T10:09:54.188
After Formatting  = 17-01-2018 10:09:54

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/LocalDateTimeDemo_format_datetimeformatter.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/LocalDateTimeDemo_format_datetimeformatter

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/8fa516d67356209c67bf6743dfb7e718c4c9e5f6/BasicJava/LocalDateTimeDemo_format_datetimeformatter/?at=master

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How to use truncatedTo method of LocalDateTime Class | Java 8 Date and Time

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https://www.youtube.com/watch?v=X7Nuvk3uH6o&list=UUhwKlOVR041tngjerWxVccw

LocalDateTimeDemo.java

import java.time.LocalDateTime;
import java.time.temporal.ChronoUnit;

public class LocalDateTimeDemo
{

    public static void main(String[] args)
    {
        LocalDateTime localDateTime1 = LocalDateTime.now();
        System.out.println(localDateTime1);
       
        /*
         * Parameters:
         *
         * unit - the unit to truncate to, not null
         *
         * Returns:
         *
         * a LocalDateTime based on this date-time with the
         * time truncated, not null
         */
        LocalDateTime localDateTime2 = localDateTime1
                .truncatedTo(ChronoUnit.DAYS);
       
        System.out.println(localDateTime2);

    }

}

Output

2018-01-17T09:54:07.362
2018-01-17T00:00

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/LocalDateTimeDemo_truncatedto.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/LocalDateTimeDemo_truncatedto

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/2732bd5046563d647669928b143687e5dbf4d99f/BasicJava/LocalDateTimeDemo_truncatedto/?at=master

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How to convert LocalDateTime to LocalDate and LocalTime | LocalDateTime Class

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LocalDateTimeDemo.java

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;

public class LocalDateTimeDemo
{

    public static void main(String[] args)
    {
        LocalDateTime localDateTime = LocalDateTime.now();
        System.out.println("localDateTime = " + localDateTime);
       
       
        /*
         * Returns the date part of this date-time, not null.
         */
        LocalDate localDate = localDateTime.toLocalDate();
        System.out.println("localDate = " + localDate);

        /*
         * Returns the time part of this date-time, not null.
         */
        LocalTime localTime = localDateTime.toLocalTime();
        System.out.println("localTime = " + localTime);

    }

}

Output

localDateTime = 2018-01-17T09:41:13.709
localDate = 2018-01-17
localTime = 09:41:13.709

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/LocalDateTimeDemo_toLocaldate_time.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/LocalDateTimeDemo_toLocaldate_time

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/2732bd5046563d647669928b143687e5dbf4d99f/BasicJava/LocalDateTimeDemo_toLocaldate_time/?at=master

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How to use range method of LocalDateTime Class | Java 8 Date and Time

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LocalDateTimeDemo.java

import java.time.LocalDateTime;
import java.time.temporal.ChronoField;
import java.time.temporal.ValueRange;

public class LocalDateTimeDemo
{

    public static void main(String[] args)
    {
        LocalDateTime localDateTime = LocalDateTime
                .parse("2018-12-03T10:15:30");

        /*
         * Parameters:
         *
         * field - the field to query the range for, not null
         *
         * Returns:
         *
         * the range of valid values for the field, not null
         */
        ValueRange valueRange = localDateTime.range(ChronoField.DAY_OF_YEAR);

        System.out.println("Range : " + valueRange);
        System.out.println("Min : " + valueRange.getMinimum());
        System.out.println("Max : " + valueRange.getMaximum());

        System.out.println("--------------------------------");

        valueRange = localDateTime.range(ChronoField.MONTH_OF_YEAR);

        System.out.println("Range : " + valueRange);
        System.out.println("Min : " + valueRange.getMinimum());
        System.out.println("Max : " + valueRange.getMaximum());
    }

}

Output

Range : 1 - 365
Min : 1
Max : 365
--------------------------------
Range : 1 - 12
Min : 1
Max : 12

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/LocalDateTimeDemo_range.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/LocalDateTimeDemo_range

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/2732bd5046563d647669928b143687e5dbf4d99f/BasicJava/LocalDateTimeDemo_range/?at=master

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How to use ofInstant method of LocalDateTime Class | Java 8 Date and Tim

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LocalDateTimeDemo.java

import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;

public class LocalDateTimeDemo
{

    public static void main(String[] args)
    {

        Instant instant = Instant.now();
        System.out.println("instant = "+instant);

        ZoneId zoneId = ZoneId.systemDefault();
        System.out.println("zoneId = "+zoneId);
        /*
         * Parameters:
         *
         * instant - the instant to create the date-time from, not
         * null
         *
         * zone - the time-zone, which may be an offset, not null
         *
         * Returns:the local date-time, not null
         */
        LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, zoneId);
        System.out.println("localDateTime = "+localDateTime);
    }

}

Output

instant = 2018-01-16T04:49:52.570Z
zoneId = Asia/Calcutta
localDateTime = 2018-01-16T10:19:52.570

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/LocalDateTimeDemo_ofInstant.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/LocalDateTimeDemo_ofInstant

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/2732bd5046563d647669928b143687e5dbf4d99f/BasicJava/LocalDateTimeDemo_ofInstant/?at=master

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How to convert LocalDateTime to OffsetDateTime using atOffset method of LocalDateTime Class

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LocalDateTimeDemo.java

import java.time.LocalDateTime;
import java.time.OffsetDateTime;
import java.time.ZoneOffset;

public class LocalDateTimeDemo
{

    public static void main(String[] args)
    {
        LocalDateTime localDateTime = LocalDateTime
                .parse("2017-02-03T12:30:30");
        System.out.println("localDateTime   = "+localDateTime);

        ZoneOffset zoneOffset = ZoneOffset.ofHours(5);
        System.out.println("zoneOffset      = "+zoneOffset);
        /*
         * Parameters:
         *
         * offset - the offset to combine with, not null
         *
         * Returns:
         *
         * the offset date-time formed from this date-time and the
         * specified offset, not null
         */
        OffsetDateTime offsetDateTime = localDateTime.atOffset(zoneOffset);
        System.out.println("offsetDateTime  = "+offsetDateTime);
    }

}

Output

localDateTime   = 2017-02-03T12:30:30
zoneOffset      = +05:00
offsetDateTime  = 2017-02-03T12:30:30+05:00

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/LocalDateTimeDemo_atOffset.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/LocalDateTimeDemo_atOffset

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/2732bd5046563d647669928b143687e5dbf4d99f/BasicJava/LocalDateTimeDemo_atOffset/?at=master

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How to use plus, minus methods which accept long and temporal unit | LocalDateTime Class

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LocalDateTimeDemo.java

import java.time.LocalDateTime;
import java.time.temporal.ChronoUnit;

public class LocalDateTimeDemo
{

    public static void main(String[] args)
    {
        LocalDateTime currentDatetime = LocalDateTime.now();
        System.out.println("currentDatetime= " + currentDatetime);

        /*
         * Parameters:
         *
         * amountToAdd - the amount of the unit to add to the result,
         * may be negative
         *
         * unit - the unit of the amount to add, not null
         *
         * Returns:
         *
         * a LocalDateTime based on this date-time with the specified
         * amount added, not null
         */
        LocalDateTime localDateTime2 = currentDatetime.plus(5,
                ChronoUnit.MONTHS);
        System.out.println("Month Added    = " + localDateTime2);

        /*
         * Parameters:
         *
         * amountToSubtract - the amount of the unit to subtract from
         * the result, may be negative
         *
         * unit - the unit of the amount to subtract, not null
         *
         * Returns:
         *
         * a LocalDateTime based on this date-time with the specified
         * amount subtracted, not null
         */

        LocalDateTime localDateTime3 = currentDatetime.minus(5,
                ChronoUnit.YEARS);
        System.out.println("Years reduced  = " + localDateTime3);
    }

}

Output

currentDatetime= 2018-01-16T09:44:12.673
Month Added    = 2018-06-16T09:44:12.673
Years reduced  = 2013-01-16T09:44:12.673

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/LocalDateTimeDemo_plus_minus_unit.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/LocalDateTimeDemo_plus_minus_unit

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/2732bd5046563d647669928b143687e5dbf4d99f/BasicJava/LocalDateTimeDemo_plus_minus_unit/?at=master

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How to check DateTime is before or after or equals to another DateTime | LocalDateTime Class

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https://www.youtube.com/watch?v=GVDlV4Sy6aY&list=UUhwKlOVR041tngjerWxVccw

LocalDateTimeDemo.java

import java.time.LocalDateTime;

public class LocalDateTimeDemo
{

    public static void main(String[] args)
    {
        LocalDateTime localDateTime1 = LocalDateTime
                .parse("2016-02-03T12:30:30");
        System.out.println("localDateTime1 = "+localDateTime1);
     
        LocalDateTime localDateTime2 = LocalDateTime
                .parse("2017-03-03T12:30:30");
         
        System.out.println("localDateTime2 = "+localDateTime2);
     
        /*
         * Returns:true if this is equal to the other date-time
         */
        System.out.println(localDateTime1.equals(localDateTime2));

        /*
         * Returns:true if this date-time is after the specified
         * date-time
         */
        System.out.println(localDateTime1.isAfter(localDateTime2));

        /*
         * Returns:true if this date-time is before the specified
         * date-time
         */

        System.out.println(localDateTime1.isBefore(localDateTime2));
    }

}

Output

localDateTime1 = 2016-02-03T12:30:30
localDateTime2 = 2017-03-03T12:30:30
false
false
true

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/LocalDateTimeDemo_equal_after_before.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/LocalDateTimeDemo_equal_after_before

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/2732bd5046563d647669928b143687e5dbf4d99f/BasicJava/LocalDateTimeDemo_equal_after_before/?at=master

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