Usage of JodaTime Java library

Hi Guys,
In this blog, I am going to explain you about JodaTime classes and API provided by this library.

Joda-Time library provides a quality replacement over Java time and date classes.Joda-Time library is the de facto standard time and date library for Java SE 8. Mostly Users are now asked to migrate to java.time.Joda-Time library is licensed under the Apace 2.0 licence business-friendly.It is a quality implementation of the DateTime library for Java. JodaTime support classes include Duration, Period, Timezone, DateTimeFormat etc.

Joda library key features:

LocalDate - only date without time
LocalTime - onlytime without date
Instant - an instant point on the time-line
DateTime - full time and date with time-zone
DateTimeZone - time-zone
Duration and Period - specific amounts of time
Interval - the time interval between two instants
A flexible and comprehensive formatter-parser 

Joda-Time includes following classes:
1. DateTime

2.LocalDateTime

3.LocalTime

4.LocalDate

5.DateMidnight.

Each DateTime classes provides some easy methods to access the DateTime fields. For example, to access the Year, Month, Week you can use:

DateTimeFormatter formatter = DateTimeFormat.forPattern("dd/MM/yyyy HH:mm:ss");
DateTime datetime = formatter.parseDateTime("31/07/2018 13:55:08");

datetime.getWeekyear();        //Returns 29 Week Count in that year
datetime.getDayOfWeek();    //Returns 1 day of the week
datetime.getMonthOfYear();    //Returns 7 Month of Year
datetime.getMinuteOfDay();    //Returns 835 Minutes of Day
datetime.getYear();        //Returns 2018 Year
datetime.getHourOfDay();    //Returns 13 Hour of Day
datetime.getSecondOfDay();    //Returns 50108 Second of Day
datetime.getSecondOfMinute();    //Returns 08 Second of Minute

We can get the Object of Date, LocalDate, LocalTime like this

Date date = datetime.toDate();             //Returns Date Object 31/07/2018 13:55:08:000 
LocalDate localDate =  datetime.toLocalDate();     //Returns LocalDate Object 31/07/2018
LocalTime localTime = datetime.toLocalTime();    //Returns LocalTime Object 13:55:08:000
LocalDateTime = datetime.toLocalDateTime();    //Returns LocalDateTime Object 31/07/2018 13:55:08:000

        

We can Also Compare Two Dates like This

DateTime dateTime2 = formatter.parseDateTime("1/08/2018 11:20:00");
dateTime.isAfter(dateTime2);  //Return False
dateTime.isBefore(dateTime2); //Return True
dateTime.isAfterNow()            //Return False

We can Also Add Hours, Minutes, Days, Seconds, Weeks like this

dateTime.plusDays(1);       //Return 01/08/2018 13:55:08
dateTime.plusMinutes(50);    //Return 31/07/2018 14:45:08
dateTime.plusWeeks(7);        //Return 07/08/2018 13:55:08
dateTime.plusHours(5);        //Return 31/07/2018 18:55:08
dateTime.plusSeconds(60);    //Return 31/07/2018 14:55:08
dateTime.plusYears(1);        //Return 31/07/2019 13:55:08

Note That DateTime,LocalDate,LocalTime are Immutable Classes.So everytime you call a plus() method you need to assign it to a variable like

dateTime = dateTime.plusDays(1);

I think it will be very helpful over Java.Util.Date API.