about files in a folder

[onlymullapudi]

I want to write a progra in java, it should function like, whenever a new file is created in a folder, it should get the details of the new file in the folder autmatically(like the name of the file).I think it can be done by keeping the program running recursevely, can anyone tell how to write te code.

 

[timw]

You need to poll the directory in a loop with a preset wait duration in between. Probably best to run this in its own thread but that depends upon your requirements. In the loop between attempts you would sleep the thread for some duration.

Tim

 

[sedj]

pseudo code :

File dir = ..
File[] oldFiles ..
File[] newFiles ..

list dir to get the list of files into 'oldFiles' variable

while (true) {
  list files into 'newFiles'
  cheeck the length - if there are more files than in 'oldFiles'
   then loop both, to find the one that is new

   Thread.sleep(1000/*millis*/);
}

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[timw]

You may even want to check the timestamps on the files and pick up files which have appeared / changed since the last time you checked.

Tim

 

[wangdong]

I am not sure, but if you can read JDesktop API, you may find a solution there.

Chinese Java Faq Forum

http://www.4ugo.com/bbs/index.htm

 

[onlymullapudi]

It worked with the files concept,
thanks for u r suggestions