Java 8 – How to format LocalDateTime

Few examples to show you how to format java.time.LocalDateTime in Java 8.

1. LocalDateTime + DateTimeFormatter

To format a LocalDateTime object, uses DateTimeFormatter

TestDate1.java

package com.mkyong.time;

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

public class TestDate1 {
    public static void main(String[] args) {

        //Get current date time
        LocalDateTime now = LocalDateTime.now();

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

        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");

        String formatDateTime = now.format(formatter);

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

Output


Before : 2016-11-09T11:44:44.797

After  : 2016-11-09 11:44:44

2. String -> LocalDateTime

Another example to convert a String to LocalDateTime

TestDate2.java

package com.mkyong.time;

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

public class TestDate2 {
    public static void main(String[] args) {

        String now = "2016-11-09 10:30";

        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm");

        LocalDateTime formatDateTime = LocalDateTime.parse(now, formatter);

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

        System.out.println("After : " + formatDateTime);

        System.out.println("After : " + formatDateTime.format(formatter));

    }
}

Output


Before : 2016-11-09 10:30

After : 2016-11-09T10:30

After : 2016-11-09 10:30

References

  1. DateTimeFormatter JavaDoc
  2. Java 8 – How to convert String to LocalDate

About the Author

author image
mkyong
Founder of Mkyong.com, love Java and open source stuff. Follow him on Twitter, or befriend him on Facebook or Google Plus. If you like my tutorials, consider make a donation to these charities.

Comments

Leave a Reply

avatar