Can't find Java IO File when compiling

bustup

Can't find Java IO File when compiling

in Integration and Hardware • 2 years ago

Hi guys,

this is probably just a stupid question, but I can't seem to get it right.

When compiling my Processing sketch it adds the data folder to the exported .app or .exe, this works fine when I use methods such as loadStrings, loadImage, loadFont, but when I use new File("data/filename.xml") it doesn't find the file in the compiled version.

Is there a way to use a relative path to the files when using new File?

Thanks

Replies(6)

amnon.owed

Re: Can't find Java IO File when compiling

2 years ago

Try putting sketchPath in front of it, like this:

new File(sketchPath + "/data/filename.xml")

bustup

Re: Can't find Java IO File when compiling

2 years ago

Thanks for your time!

That works when running it from the IDE, but when compiled, it doesn't find the file unless I put it in the same folder as the compiled app.

Maybe I misunderstood things, but I thought Processing moved the data-folder into the jar-file when exporting, since I can reach data/filename.xml if I use loadStrings without copying the data-folder inside the same folder as the app.

How does things actually work?

edit:

This works:

void setup() {
String[] f = loadStrings("data/sequence.xml");
for (int i = 0; i < f.length; i++)
println(f[i]);
}
void draw() {
}

This doesn't:

void setup() {
File f = new File("data/sequence.xml"); // tried using sketchPath
println(f.exists()); // doesn't find the file when compiled
}
void draw() {
}

bustup

Re: Can't find Java IO File when compiling

2 years ago

Okay, did a bit of searching and found out that ~~this works~~

import java.net.URL;
void setup() {
URL url = YourClass.class.getResource("data/filename.xml");
String filesPathAndName = url.getPath();
println(filesPathAndName);
}
void draw() {
}

Is this a good or bad way of doing it?

Edit:

It doesn't work. It just loaded the filename, not the resource, hence I didn't get any NullPointer.

Still need help folks! :)

PhiLho

Re: Can't find Java IO File when compiling

2 years ago

Do it like loadStrings does: File file = new File(dataPath(filename));
And check that the data folder is in the jar, a version of Processing had issues with this on Windows.

bustup

Re: Can't find Java IO File when compiling

2 years ago

Thanks, but how do I check that the data folder is in the jar? If I write File file = new File(dataPath(fileName)); the file is found when I run the sketch from the Processing IDE, but not when I compile it.

PhiLho

Re: Can't find Java IO File when compiling

2 years ago

It is strange that loadStrings works, then.

A .jar file is just a .zip file with a different name. Try and open it with your favorite archive manager, like the excellent 7-Zip.

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