exec, files location problem

In my jar application I do some calculations in exe program. When files and program.exe was in the same dir I used this command:

String[] str={"program.exe", "file1.txt", "file2.txt"};
pr = rt.exec(str);

and it worked great. But when I moved files to other dir and I try use this command:

String[] str={"program.exe", "temp\\file1.txt", "temp\\file2.txt"};
pr = rt.exec(str);

program.exe doesn't see files. What is more odd it start to see files when I change its names for anything else that default. file1.txt, file2.txt and temp are created in my jar program before program.exe start.

edit:

When problem started I try sth like this: default names file1.txt and file2.txt, I changed to aaa.txt and bbb.txt (in windows), 开发者_开发技巧and then:

 String[] str={"program.exe", "temp\\aaa.txt", "temp\\bbb.txt"};

and it works.

edit2:

Now I know that problem is in program.exe. When I use it from command line (not from jar), like this:

program.exe temp\file1.txt temp\file2.txt 

error:

FANN Error 1: Unable to open configuration file "temp\file1.txtÉ║@" for reading.

fann is artificial neural network library. When I copy files to program.exe dir:

program.exe file1.txt file2.txt 

it works! When I changed files names in temp and do:

program.exe temp\file1aaa.txt temp\file2bbb.txt

it works also! So it is fann lib bug?

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I'd use the ProcessBuilder api (it gives you much more control than Runtime.exec()) and I'd also use absolute paths:

File directory = new File("/path/tp/program.exe's/parent");

int returnCode = new ProcessBuilder("program.exe", 
    new File(directory, "temp/file1.txt").getAbsolutePath(),
    new File(directory, "temp/file2.txt").getAbsolutePath()
)
.directory(directory).start().waitFor();

---

Give complete path of the filename and see. Something like below

String[] str = {"program.exe", "D:\\temp\\file1.txt", "D:\\temp\\file2.txt"}; 

If your OS is UNIX based then change it accordingly.

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Have you tried relative path for finding the location like
abc (folder)
 -> code(folder)
  -->Program.Java
 -> temp
  --> file1.txt
so
when u run ur program in Eclipse IDE ur relative path will be from program.java file is
../temp/file1.txt And try to use / instead of \ so that it wont take as an escape character.
when u run from a jar You need to extract the temp folder from jar to outside
abc (folder)
 -> jar (folder)
  -->Program.jar
 -> temp
  --> file1.txt


OR
Read the jar content from the program as a zip file. Reach your temp folder inside it by code and then read the content as input stream.