$show=/label

Java 8 - How To Format or Parse Date to LocalDateTime And Back?

SHARE:

A quick guide to convert string to date as LocalDateTime and LocalDateTime back to String as Date in java 8 with examples.

1. Overview

In this tutorial, We'll learn in java 8 how to convert string date to LocalDateTime object and LocalDateTime back to String format.

We can parse the string date in any valid format to date object such as LocalDateTime.

Let us take the input string in "yyyy-MM-dd HH:mm:ss" format.

Java 8 - How To Format or Parse Date to LocalDateTime?


2. Parse String Date to LocalDateTime Java 8 API

Follow the below steps to convert string to LocalDateTime object.


Step 1: Create the String with the valid date.


Step 2: Create DateTimeFormatter object using DateTimeFormatter.ofPattern() which input string date pattern is. In our case, we have string date is in yyyy-MM-dd HH:mm:ss format, so we need to pass the same format to ofPattern() method.


Step 3: Use LocalDateTime.parse() method and pass string date, datetimeformatter. Finally, parse() method returns LocalDateTime object with the date string values.


Next, look at the following example code that is implemented using all these steps.

package com.javaprogramto.java8.dates.parse;

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

public class ParseStringToLocalDateTime {

	public static void main(String[] args) {
		
		// Date in string format
		String dateInStr = "2022-01-01 23:30:50";
		
		// Creating datetimeformatter object with pattern "yyyy-MM-dd HH:mm:ss"
		DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
		
		// converting string to date time using custom formatter
		LocalDateTime datetime = LocalDateTime.parse(dateInStr, dateTimeFormatter);
		
		// printing the input and output
		System.out.println("Input date in string : "+dateInStr);
		System.out.println("Output LocalDateTime : "+datetime);
	}
}
 

Output:

Input date in string : 2022-01-01 23:30:50
Output LocalDateTime : 2022-01-01T23:30:50
 


3. Format LocalDateTime To String Using Java 8 API

Now, We need to take the LocalDateTime object and format it back to String in the different format as "yyyy-MMM-dd hh:mm a".

Next, take the output from the above section and format it to string.


Input string format: yyyy-MM-dd HH:mm:ss

Output String format: yyyy-MMM-dd hh:mm a


Now the difference is that output date string is added more descriptive month and AM/PM section.

package com.javaprogramto.java8.dates.parse;

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

public class FormatLocalDateTimeToString {

	public static void main(String[] args) {

		// Getting LocalDateTime object.
		LocalDateTime datetime = getLocalDateTime();
		
		// Creating datetimeformatter object with pattern "yyyy-MMM-dd hh:mm a"
		DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MMM-dd hh:mm a");
		
		// formatting LocalDateTime to String
		String dateInString = datetime.format(dateTimeFormatter);
		
		// printing the output string
		System.out.println("LocalDateTime back in String form : "+dateInString);
	}

	private static LocalDateTime getLocalDateTime() {
		// Date in string format
		String dateInStr = "2022-01-01 23:30:50";

		// Creating datetimeformatter object with pattern "yyyy-MM-dd HH:mm:ss"
		DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");

		// Returning LocalDateTime object.
		return LocalDateTime.parse(dateInStr, dateTimeFormatter);
	}
}
 

Output:

LocalDateTime back in String form : 2022-Jan-01 11:30 PM
 

4. Conclusion

In this article, We've seen how to convert String to LocalDateTime and back in java 8 with example programs.

GitHub

Ref

LocalDateTime

String Methods

COMMENTS

BLOGGER

About Us

Author: Venkatesh - I love to learn and share the technical stuff.
Name

accumulo,1,ActiveMQ,2,Adsense,1,API,37,ArrayList,16,Arrays,16,Bean Creation,3,Bean Scopes,1,BiConsumer,1,Blogger Tips,1,Books,1,C Programming,1,Collection,5,Collections,28,Collector,1,Command Line,1,Compile Errors,1,Configurations,7,Constants,1,Control Statements,8,Conversions,6,Core Java,93,Corona India,1,Create,2,CSS,1,Date,3,Date Time API,35,Dictionary,1,Difference,1,Download,1,Eclipse,2,Efficiently,1,Error,1,Errors,1,Exception,1,Exceptions,3,Fast,1,Files,13,Float,1,Font,1,Form,1,Freshers,1,Function,3,Functional Interface,2,Garbage Collector,1,Generics,4,Git,4,Grant,1,Grep,1,HashMap,1,HomeBrew,2,HTML,2,HttpClient,2,Immutable,1,Installation,1,Interview Questions,5,Iterate,2,Jackson API,3,Java,30,Java 10,1,Java 11,5,Java 12,5,Java 13,2,Java 14,2,Java 8,105,Java 8 Difference,2,Java 8 Stream Conversions,2,java 8 Stream Examples,3,Java 9,1,Java Conversions,11,Java Design Patterns,1,Java Files,1,Java Program,3,Java Programs,104,java.lang,5,java.util. function,1,jQuery,1,Kotlin,11,Kotlin Conversions,6,Kotlin Programs,10,Lambda,1,lang,29,Leap Year,1,live updates,1,LocalDate,1,Logging,1,Mac OS,2,Math,1,Matrix,5,Maven,1,Method References,1,Mockito,1,MongoDB,3,New Features,1,Operations,1,Optional,6,Oracle,5,Oracle 18C,1,Partition,1,Patterns,1,Programs,1,Property,1,Python,2,Quarkus,1,Read,1,Real Time,1,Recursion,2,Remove,2,Rest API,1,Schedules,1,Serialization,1,Servlet,2,Sort,1,Sorting Techniques,8,Spring,2,Spring Boot,23,Spring Email,1,Spring MVC,1,Streams,27,String,58,String Programs,12,String Revese,1,Swing,1,System,1,Tags,1,Threads,11,Tomcat,1,Tomcat 8,1,Troubleshoot,16,Unix,3,Updates,3,util,5,While Loop,1,
ltr
item
JavaProgramTo.com: Java 8 - How To Format or Parse Date to LocalDateTime And Back?
Java 8 - How To Format or Parse Date to LocalDateTime And Back?
A quick guide to convert string to date as LocalDateTime and LocalDateTime back to String as Date in java 8 with examples.
https://1.bp.blogspot.com/-H4ei9P1FHlg/X8ewWWMiJ_I/AAAAAAAADHE/TjO1xpadJDsOZfywALSOij-FszPNEAregCLcBGAsYHQ/w640-h482/Java%2B8%2B-%2BHow%2BTo%2BFormat%2Bor%2BParse%2BDate%2Bto%2BLocalDateTime%253F.png
https://1.bp.blogspot.com/-H4ei9P1FHlg/X8ewWWMiJ_I/AAAAAAAADHE/TjO1xpadJDsOZfywALSOij-FszPNEAregCLcBGAsYHQ/s72-w640-c-h482/Java%2B8%2B-%2BHow%2BTo%2BFormat%2Bor%2BParse%2BDate%2Bto%2BLocalDateTime%253F.png
JavaProgramTo.com
https://www.javaprogramto.com/2020/12/java8-date-format-parse-localdatetime.html
https://www.javaprogramto.com/
https://www.javaprogramto.com/
https://www.javaprogramto.com/2020/12/java8-date-format-parse-localdatetime.html
true
3124782013468838591
UTF-8
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS PREMIUM CONTENT IS LOCKED STEP 1: Share to a social network STEP 2: Click the link on your social network Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy Table of Content