how to check whether the file exist?

[kokhwakoh]

I am kokhwa.

I had use Runtime.exec() to run a program. The program will generate a file.

I need to read the file to generate another file.
So i have to wait the program generate the file which i want.

What method should i use to wait until the program generate the file i want?If the file had been generated,
I will use it. If not, I have to wait it until the file had been generate.

...That is my problem!

anybody know how to solve this problem?
Thanks for your help!

[cjard]

something like this:

java.io.File needed = new java.io.File("C:\myfile.txt");

while( !needed.exists() ){
  Thread.sleep(2000); //sleep for 2 seconds.. MUST DO THIS
}

your code will go into the loop until the file exists, checking every 2 seconds

note also there are many exceptions thrown that i have not try{}catch{}ed