LocalDateTime Formatting in Java

In this tutorial, you will learn how to format LocalDateTime objects in Java.

Here's an example that formats current datetime into a specific pattern using DateTimeFormatter:

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

public class LocalDateTimeFormattingExample {

   public static void main(String[] args) {

      LocalDateTime now = LocalDateTime.now();
      System.out.println("Before formatting : " + now);

      DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd hh:mm:ss a");
      String formattedDateTime = now.format(formatter);

      System.out.println("After formatting : " + formattedDateTime);

   }

}

The output of the above code is as follows:

Before formatting : 2022-01-08T12:21:16.450152400
After formatting : 2022-01-08 12:21:16 PM

Here's an additional example that demonstrates how to format a String representing a datetime into a LocalDateTime object:

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

public class LocalDateTimeFormattingExample {

   public static void main(String[] args) {

      String stringDateTime = "16-01-2022 10:34:45 PM";
      System.out.println("Before formatting : " + stringDateTime);

      DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd-MM-yyyy hh:mm:ss a");
      LocalDateTime formattedLocalDateTime = LocalDateTime.parse(stringDateTime, formatter);

      System.out.println("After formatting : " + formattedLocalDateTime);
   }
}

The output of the above code is as follows:

Before formatting : 16-01-2022 10:34:45 PM
After formatting : 2022-01-16T22:34:45