FileOuputStream is not working (Windows 7)

Programming Questions

noncom

FileOuputStream is not working (Windows 7)

in Programming Questions • 3 years ago

Hello. I have written a program that saves some data into a file on a disk. The problem is that FileOutputStream does not create a file..

void Save(String path, aFile saveFile)
{
FileOutputStream fileOut = null;
DataOutputStream dataOut = null;
try
{
fileOut = new FileOutputStream(path);
dataOut = new DataOutputStream(fileOut);
}
catch (FileNotFoundException e)
{
System.out.println(e);
}
//Starting writing.
//marker - file beginning
print("START WRITING FILE\nWriting beginner marker...");
dataOut.writeInt(0xFFFFFFFF);
println("OK");
//code goes on...
}

...actually the first call for the dataOut.writeInt() function generates an error that dataOut does not exist (or FileNotFoundException if no try-catch is used). The ouput file also does not get created nither in the sketch directory nor in the processing folder. I think it is somehow related with the Windows version as I remember a code similar with this one worked on WindowsXP... Any ideas?

PS: UAC is disabled. Tried to run as administrator either..

Replies(3)

noncom

Re: FileOuputStream is not working (Windows 7)

3 years ago

I see no one can help me with this... so many views and no replies at all... anyway, after countless experiments and with my jobmates help I figured out that it is obligatory to include all file-related routines into a try-catch block what I did not before. If anyone is interested, my function now looks like this:

void Save(String path, aFile saveFile)
{
FileOutputStream fileOut = null;
DataOutputStream dataOut = null;
try
{
fileOut = new FileOutputStream(path);
dataOut = new DataOutputStream(fileOut);
println(fileOut);
println(dataOut);
}
catch(Exception e)
{
println(e);
}
try
{
//Starting writing.
//marker - file beginning
print("START WRITING aFile class FILE\nWriting beginner marker...");
dataOut.writeInt(0xFFFFFFFF);
println("OK");
//writing bounds
int intsLength = saveFile.ints.length;
int floatsLength = saveFile.floats.length;
println("\nWriting bounds:" + " intsLength " + intsLength + " floatsLength " + floatsLength);
print("Writing ints...");
print("length: " + intsLength + "...");
dataOut.writeInt(intsLength);
println("OK");
print("\nWriting floats...");
print("length: " + floatsLength + "...");
dataOut.writeInt(intsLength);
println("OK");
//More file-writing code to be here
dataOut.flush();
dataOut.close();
}
catch (Exception e)
{
System.out.println(e);
}
}

Ok, it works like this now. But. Still. There is a problem. in case of a relative path, I do not get the output files created neither in the directory of the sketch nor in the Processing folder. However, if I use an absolute path, then it works. I would like to know what is it wrong I am doing with the relative one.

owaunandr..

Re: FileOuputStream is not working (Windows 7)

3 years ago

Thanks..

Do you know of any way to read any file , albeit text or bytes and the file has processing code line by line.

How can I now effectly run this code in processing ?

I want to build a processing loader of sorts. I have tons of sketches and keeping track of all the awesome sketches I find online would give me a way to share it with others. Sort of an electronic version of the now defunct builtwithprocessing.org

noncom

Re: FileOuputStream is not working (Windows 7)

3 years ago

Um, see my answer in your dedicated thread.

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