Validating date format in java

The Local Date date = Local Date.now(); Date Time Formatter formatter = Date Time Pattern("yyyy MM dd"); String text = date.format(formatter); Local Date parsed Date = Local Date.parse(text, formatter); Symbol Meaning Presentation Examples ------ ------- ------------ ------- G era text AD; Anno Domini; A u year year 2004; 04 y year-of-era year 2004; 04 D day-of-year number 189 M/L month-of-year number/text 7; 07; Jul; July; J d day-of-month number 10 Q/q quarter-of-year number/text 3; 03; Q3; 3rd quarter Y week-based-year year 1996; 96 w week-of-week-based-year number 27 W week-of-month number 4 E day-of-week text Tue; Tuesday; T e/c localized day-of-week number/text 2; 02; Tue; Tuesday; T F week-of-month number 3 a am-pm-of-day text PM h clock-hour-of-am-pm (1-12) number 12 K hour-of-am-pm (0-11) number 0 k clock-hour-of-am-pm (1-24) number 0 H hour-of-day (0-23) number 0 m minute-of-hour number 30 s second-of-minute number 55 S fraction-of-second fraction 978 A milli-of-day number 1234 n nano-of-second number 987654321 N nano-of-day number 1234000000 V time-zone ID zone-id America/Los_Angeles; Z; - z time-zone name zone-name Pacific Standard Time; PST O localized zone-offset offset-O GMT 8; GMT ; UTC-; X zone-offset 'Z' for zero offset-X Z; -08; -0830; -; -083015; -; x zone-offset offset-x 0000; -08; -0830; -; -083015; -; Z zone-offset offset-Z 0000; -0800; -; p pad next pad modifier 1 ' escape for text delimiter '' single quote literal ' [ optional section start ] optional section end # reserved for future use reserved for future use .Pattern letters 'L', 'c', and 'q' specify the stand-alone form of the text styles.

We have used "/" and "-" character as a separator within the date format but you are free to change that separator the way you want.Among various kind of data validation, validation of date is one. Later we take each part of the string supplied by user (i.e.In this tutorial, we discussed how you can perform Java Script date validation in 1. dd, mm and yyyy) and check whether dd is a valid date, mm is a valid month or yyyy is a valid year.If it is less than 9, then the nano-of-second value is truncated, with only the most significant digits being output.Year: The count of letters determines the minimum field width below which padding is used.

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