Update file date/time stamp using java

Question

Let me explain you what I am going through:-
I have created a java based installer using Jexpress tool and after I do the installation of my files, the files takes the current date rather then taking the date when it was created or modified.
Everything goes into JAR and I heard that Jar file do not retain the date/time stamp of the file.
I would like to know if we can change the date and time stamp of the files using Java.
Is there any method to do that or can we do this by writing the java class?
Thank You
Mehul

Answer 1

Did you check it?
I did.
$ jar cvf ~/ui *.m3u
added manifest
adding: Amollhgv.m3u(in = 42) (out= 24)(deflated 42%)
adding: Brand1.m3u(in = 56) (out= 27)(deflated 51%)
adding: Brand2.m3u(in = 42) (out= 24)(deflated 42%)
adding: Brand3.m3u(in = 42) (out= 24)(deflated 42%)
adding: Brand4.m3u(in = 42) (out= 24)(deflated 42%)
adding: Brand5.m3u(in = 42) (out= 24)(deflated 42%)
adding: Brand6.m3u(in = 42) (out= 24)(deflated 42%)
adding: Edurhgv.m3u(in = 42) (out= 24)(deflated 42%)
$ unzip -l ~/ui
Archive:  /home/ijbalazs/ui
  Length     Date   Time    Name
        0  12-04-03 17:53   META-INF/
       71  12-04-03 17:53   META-INF/MANIFEST.MF
       42  08-26-02 01:03   Amollhgv.m3u
       56  11-22-98 01:15   Brand1.m3u
       42  08-26-02 01:04   Brand2.m3u
       42  08-26-02 01:04   Brand3.m3u
       42  08-26-02 01:04   Brand4.m3u
       42  08-26-02 01:04   Brand5.m3u
       42  08-26-02 01:04   Brand6.m3u
       42  08-26-02 01:04   Edurhgv.m3u
      421                   10 files