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Set last modified time of a file or directory

  1. /*
  2.   Set last modified time of a file or directory
  3.   This Java example shows how set last modified time of a particular
  4.   file or directory using setLastModified method of Java File class.
  5. */
  6.  
  7. import java.io.*;
  8. import java.util.Date;
  9.  
  10. public class SetFileLastModifiedTime {
  11.  
  12.   public static void main(String[] args) {
  13.    
  14.     //create file object
  15.     File file = new File("C://FileIO//ReadText.txt");
  16.    
  17.     Date lastModified = new Date(file.lastModified());
  18.     System.out.println("Last modified time of file is : " + lastModified );
  19.    
  20.     /*
  21.      * To set last modified time of a file, use
  22.      * boolean lastModifiedTime(long time) method of Java File class.
  23.      *
  24.      * Here, time is milliseconds since Jan 01, 1970 00:00:00.
  25.      *
  26.      * This method returns true if operation was successful, false otherwise.
  27.      */
  28.    
  29.      lastModified = new Date();
  30.    
  31.      //set last modified time to current time
  32.      boolean blnSuccess = file.setLastModified(lastModified.getTime());
  33.    
  34.      System.out.println("Was last modified time set successfully ?:" + blnSuccess);
  35.    
  36.      System.out.println("File last modification date is : " +
  37.        new Date(file.lastModified()));
  38.    
  39.   }
  40. }
  41.  
  42. /*
  43. Typical output would be
  44. Last modified time of file is : Sun Jan 06 16:23:55 EST 2008
  45. Was last modified time set successfully ?:true
  46. File last modification date is : Mon Jan 07 20:50:00 EST 2008
  47. */