Question

How to modify a file date in Java

Answer 1

package javaapplication1;

import java.io.*;
import java.text.*;
import java.util.Date;

public class JavaApplication1 
{
    public static void main(String[] args) 
    {
        try
        {
            File file = new File("d:\\data.txt");
 
            SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
            System.out.println(sdf.format(file.lastModified())); 
            
            sdf = new SimpleDateFormat("HH");
            String hh = sdf.format(file.lastModified());
            sdf = new SimpleDateFormat("mm");
            String mm = sdf.format(file.lastModified());
            sdf = new SimpleDateFormat("ss");
            String ss = sdf.format(file.lastModified());
            
            String newdate = "02/15/2014 " + hh + ":" + mm + ":" + ss;
            sdf = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
            Date date = sdf.parse(newdate);
            file.setLastModified(date.getTime());
            System.out.println(sdf.format(file.lastModified())); 
        }
        catch (Exception e)
        {
            System.out.println(e.toString());
        }  
    }
}

/*

run:

06/20/2015 23:06:33
02/15/2014 23:06:33

*/

 

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