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What is SimpleDateFormat in Java?
The java.text.SimpleDateFormat class is used to format and parse a string to date and date to string.
Parsing a date string
One of the constructors of this class accepts a String value representing the desired date format and creates SimpleDateFormat object. To parse/convert a string as a Date object
- Instantiate this class by passing desired format string.
- Parse the date string using the parse() method.
Example
import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; public class Sample { public static void main(String args[]) throws ParseException { String date_string = "2007-25-06"; //Instantiating the SimpleDateFormat class SimpleDateFormat formatter = new SimpleDateFormat("yyyy-dd-MM"); //Parsing the given String to Date object Date date = formatter.parse(date_string); System.out.println("Date value: "+date); } }
Output
Date value: Mon Jun 25 00:00:00 IST 2007
Retrieving a pattern string
The toPattern() method of this class returns the pattern string representing the format of the current object.
Example
import java.text.ParseException; import java.text.SimpleDateFormat; public class Demo { public static void main(String args[]) throws ParseException { SimpleDateFormat obj = new SimpleDateFormat(); String pattern = obj.toPattern(); System.out.println(pattern); } }
Output
M/d/yy h:mm a
Parsing a date from text
The parse() method of this class accepts ParsePosition as a parameter along with date string and, parses date from a text.
Example
import java.text.ParseException; import java.text.ParsePosition; import java.text.SimpleDateFormat; import java.util.Date; public class Sample { public static void main(String args[]) throws ParseException { String text = "Marriage date of Samrat is 2007-25-06"; //Instantiating the SimpleDateFormat class SimpleDateFormat formatter = new SimpleDateFormat("yyyy-dd-MM"); //Parsing date from the given text ParsePosition pos = new ParsePosition(27); Date date = formatter.parse(text, pos); System.out.println("Date value: "+date); } }
Output
Date value: Mon Jun 25 00:00:00 IST 2007
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