Format a Date in Java 8 using LocalDateTime

Format a Date in Java 8 using LocalDateTime

Date in Java is formatted using java.time.format.DateTimeFormatter class that formats a date in a particular format. Current date or time is fetched using java.time.LocalDateTime using now() method that returns the current date.

Date returns using now() method is in the format - yyyy-MM-ddTHH:mm:ss. For example, 2017-11-09T19:14:10.402

There are different ways to define the formatter as shown below:
1) DateTimeFormatter formatter = new DateTimeFormatterBuilder().parseCaseInsensitive().appendPattern("yyyy-MM-dd HH:mm:ss").toFormatter(Locale.ENGLISH);
2) DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");

Below is the sample program to format a date and get a date in String format.

package com.learning;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeFormatterBuilder;
import java.util.Locale;

public class DateFormatJava8 {

 public static void main(String args[]) {

  LocalDateTime now = LocalDateTime.now();

  System.out.println("Original Date - " + now);
  
  DateTimeFormatter formatter = new DateTimeFormatterBuilder().parseCaseInsensitive().appendPattern("yyyy-MM-dd HH:mm:ss").toFormatter(Locale.ENGLISH);

  String formattedDate = now.format(formatter);
  
  System.out.println("Formatted Date - " + formattedDate);
 }

}

Output:

Original Date - 2017-11-09T19:19:49.428
Formatted Date - 2017-11-09 19:19:49