The SimpleDateFormat class is used to parse and format dates. To create an object, firstly import the following packageimport java.text.SimpleDateFormat;Set the dateString strDate = "'Year = '"; strDate += "yyyy"; strDate += "'Month = '"; strDate += "MMMMMMMMM"; strDate += "'Hours = '"; strDate += "hh"; strDate += "a"; strDate += "'Minutes = '"; strDate += "mm"; strDate += "'Seconds = '"; strDate += "ss";Now, create an object and format the date −SimpleDateFormat dateFormat = new SimpleDateFormat(strDate); String formattedDate = dateFormat.format(new Date());The following is an example −Example Live Demoimport java.text.SimpleDateFormat; import java.util.Date; public class Demo {    public static void main(String ... Read More

To set a duration, let us declare two objects of Calendar classCalendar c1 = Calendar.getInstance(); Calendar c2 = Calendar.getInstance();Set a time for one of the calendar objectsc2.add(Calendar.HOUR, 9); c2.add(Calendar.MINUTE, 15); c2.add(Calendar.SECOND, 40);Now, find the difference between both the time. One would be the current time and another we declared above −long calcSeconds = (c2.getTimeInMillis() - c1.getTimeInMillis()) / 1000;The following is an example −Example Live Demoimport java.util.Calendar; public class Demo { public static void main(String args[]) {     Calendar c1 = Calendar.getInstance();     Calendar c2 = Calendar.getInstance();     // set hour, minute and second     c2.add(Calendar.HOUR, 9);   ... Read More

Firstly, import the following Java packages −import java.text.SimpleDateFormat; import java.util.Date;Now, create objects −Date dt = new Date(); SimpleDateFormat dateFormat;Displaying date in the format we wantdateFormat = new SimpleDateFormat("E MMM dd yyyy");The following is an example −Example Live Demoimport java.text.SimpleDateFormat; import java.util.Date; public class Demo {    public static void main(String args[]) {       Date dt = new Date();       SimpleDateFormat dateFormat;       dateFormat = new SimpleDateFormat("E MMM dd yyyy");       System.out.println("Date: "+dateFormat.format(dt));    } }OutputDate: Thu Nov 22 2018

Firstly, import the following Java packagesimport java.text.SimpleDateFormat; import java.util.Date;Now, create objectsDate dt = new Date(); SimpleDateFormat dateFormat;Displaying date in the format we want −dateFormat = new SimpleDateFormat("dd MMM yyyy hh:mm:ss zzz");The following is an example −Example Live Demoimport java.text.SimpleDateFormat; import java.util.Date; public class Demo {    public static void main(String args[]) {       Date dt = new Date();       SimpleDateFormat dateFormat;       dateFormat = new SimpleDateFormat("dd MMM yyyy hh:mm:ss zzz");       System.out.println("Date: "+dateFormat.format(dt));    } }OutputDate: 22 Nov 2018 07:53:58 UTC

For default format, use −DateFormat.getDateInstance(DateFormat.DEFAULT)To parse the string date value, use the parse() methodDate dt = DateFormat.getDateInstance(DateFormat.DEFAULT).parse("Nov 19, 2018");The following is an example −Example Live Demoimport java.text.DateFormat; import java.util.Date; public class Demo {    public static void main(String[] argv) throws Exception {       // parse date       Date dt = DateFormat.getDateInstance(DateFormat.DEFAULT).parse("Nov 19, 2018");       System.out.println("Date: "+dt);    } }OutputDate: Mon Nov 19 00:00:00 UTC 2018

In Java, you can parse string date time value input usingSimpleDateFormat("E, dd MMM yyyy HH:mm:ss Z");We have used the above class since we imported the following package −import java.text.SimpleDateFormat;Now, we can display the date in the same format −Date dt = (Date) dateFormatter.parseObject("Tue, 20 Nov 2018 16:10:45 -0530");The following is an example −Example Live Demoimport java.text.Format; import java.text.SimpleDateFormat; import java.util.Date; public class Main {    public static void main(String[] argv) throws Exception {       Format dateFormatter = new SimpleDateFormat("E, dd MMM yyyy HH:mm:ss Z");       Date dt = (Date) dateFormatter.parseObject("Tue, 20 Nov 2018 16:10:45 -0530");     ... Read More

Create a SimpleDateFormat object −SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy.MM.dd.HH.mm.ss");Do not forget to import the following package for SimpleDateFormat class −import java.text.SimpleDateFormat;Now, since we have set the format for date above, let us parse the date using parseObject() method −Date dt = (Date) dateFormat.parseObject("2018.11.22.11.50.15");The following is an example −Example Live Demoimport java.util.Date; import java.text.SimpleDateFormat; public class Demo {    public static void main(String[] argv) throws Exception {       SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy.MM.dd.HH.mm.ss");       // parse       System.out.println("Parse Date and Time...");        Date dt = (Date) dateFormat.parseObject("2018.11.22.11.50.15");       System.out.println(dt);    } }OutputParse ... Read More

UseSimpleDateFormat('dd-MMM-yy') for string date.Format dateFormatter = new SimpleDateFormat("dd-MMM-yy");For above class, do not forget to import the following package, else an error would be visible.import java.text.SimpleDateFormat;Now, parse the date.Date dt = (Date) dateFormatter.parseObject("20-Nov-18");Example Live Demoimport java.text.Format; import java.text.SimpleDateFormat; import java.util.Date; public class Main {    public static void main(String[] argv) throws Exception {       Format dateFormatter = new SimpleDateFormat("dd-MMM-yy");       // parse       Date dt = (Date) dateFormatter.parseObject("20-Nov-18");       System.out.println("Date = "+dt);    } }OutputDate = Tue Nov 20 00:00:00 UTC 2018

To get the time format, use the DateFormat class and create a new object.DateFormat dateFormatter = new SimpleDateFormat("hh.mm.ss a");Now, parse the time.dateFormatter.parse("12.55.20 PM");Example Live Demoimport java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; public class Main {    public static void main(String[] argv) throws Exception {       DateFormat dateFormatter = new SimpleDateFormat("hh.mm.ss a");       System.out.println("Parse Time...");       Date dt = (Date) dateFormatter.parse("12.55.20 PM");       System.out.println(dt);    } }OutputParse Time... Thu Jan 01 12:55:20 UTC 1970

For GregorianCalendar class, import the following package.import java.util.GregorianCalendar;Create an object.GregorianCalendar cal = (GregorianCalendar) GregorianCalendar.getInstance();Now, use the following field and add() method with a negative one (-1) to display the previous year.cal.add((GregorianCalendar.YEAR), -1)Example Live Demoimport java.util.Calendar; import java.util.GregorianCalendar; public class Demo {    public static void main(String[] a) {       GregorianCalendar cal = (GregorianCalendar) GregorianCalendar.getInstance();       System.out.println("Current date: " + cal.getTime());       // previous year       cal.add((GregorianCalendar.YEAR), -1);       System.out.println("Modified date: " + cal.getTime());    } }OutputCurrent date: Mon Nov 19 18:05:49 UTC 2018 Modified date: Sun Nov 19 18:05:49 UTC 2017