How to format FileTime in Java

By mkyong | Updated: July 22, 2020

Viewed: 3,774 (+20 pv/w)

Tags: format date io java java.io java.nio java.time

In Java, we can use DateTimeFormatter to convert the FileTime to other custom date formats.

public static String formatDateTime(FileTime fileTime) {

        LocalDateTime localDateTime = fileTime
                .toInstant()
                .atZone(ZoneId.systemDefault())
                .toLocalDateTime();

        return localDateTime.format(
              DateTimeFormatter.ofPattern("MM/dd/yyyy HH:mm:ss"));
}

1. File Last Modified Time

This example displays the last modified time of a file in a custom date format.

package com.mkyong.io.howto;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.BasicFileAttributes;
import java.nio.file.attribute.FileTime;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;

public class GetLastModifiedTime {

    private static final DateTimeFormatter DATE_FORMATTER =
            DateTimeFormatter.ofPattern("MM/dd/yyyy HH:mm:ss");

    public static void main(String[] args) {

        String fileName = "/home/mkyong/test";

        try {

            Path file = Paths.get(fileName);
            BasicFileAttributes attr =
                    Files.readAttributes(file, BasicFileAttributes.class);

            // default YYYY-MM-DDThh:mm:ss[.s+]Z
            System.out.println("lastModifiedTime: " + attr.lastModifiedTime());

            FileTime fileTime = attr.lastModifiedTime();
            System.out.println("lastModifiedTime: " + formatDateTime(fileTime));


        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public static String formatDateTime(FileTime fileTime) {

        LocalDateTime localDateTime = fileTime
                .toInstant()
                .atZone(ZoneId.systemDefault())
                .toLocalDateTime();

        return localDateTime.format(DATE_FORMATTER);
    }

}

Output

lastModifiedTime: 2020-07-20T09:29:54.627222Z

lastModifiedTime: 07/20/2020 17:29:54

Download Source Code

References

• Managing File Metadata
• Java Date Time Tutorials
• How to get file last modified date in Java