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

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

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Madhu Stv Recent comment authors
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Madhu Stv
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Madhu Stv

Thank you for the String to LocalDateTime conversion tip. Saved my time.

Madhu Stv
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Madhu Stv

EDIT:- formatDateTime.format(formatter) will return you String object but not LocalDateTime object.