The time) method sets the last modified date of the file indicated by abstract pathname.


Following is the declaration for time) method −

public boolean setLastModified(long time)


time − The new last-modified time in milliseconds since the epoch.

Return Value

This method returns true if the operation succeeded, else false.


SecurityException − If a security manager exists and its method denies write access to either the old or new pathnames.


The following example shows the usage of time) method.

package com.tutorialspoint;

import java.text.SimpleDateFormat;
import java.util.Date;

public class FileDemo {

   public static void main(String[] args) {      
      File f = null;
      boolean bool = false;
      int year, month, day;
      long millisec;
      Date dt;
      try {
         // create new File object
         f = new File("C:/test.txt");
         // date components
         year = 2013; 
         month = 04; 
         day = 15;
         // date in string
         String s = year+"/"+month+"/"+day;
         // date format
         SimpleDateFormat sdf = new SimpleDateFormat("yyyy/mm/dd");
         // parse string to date object
         dt = sdf.parse(s);
         // calculate milliseconds
         millisec = dt.getTime();
         // returns true if file exists
         bool = f.exists();
         // if file exists
         if(bool) {
            // set last modified time
            bool = f.setLastModified(millisec);
            // print
            System.out.println("lastModified() succeeded?: "+bool);
            // last modified time
            millisec = f.lastModified();
            // calculate date object
            dt = new Date(millisec);
            // prints
            System.out.print("File was last modified on: "+dt);
      } catch(Exception e) {
         // if any error occurs

Let us compile and run the above program, this will produce the following result −

lastModified() succeeded?: true
File was last modified on: Tue Jan 15 00:04:00 IST 2013