Question

I have an application that creates a temporary mp3-file and puts it in a directory like C:\

File tempfile = File.createTempFile("something", ".mp3", new File("C:\\));

I’m able to read it by just using that same tempfile again.
Everything works fine in the Eclipse IDE.

But when I export my project for as a Runnable jar, my files are still being made correctly (I can play them with some normal music player like iTunes) but I can’t seem to read them anymore in my application.

I found out that I need to use something like getClass().getResource("/relative/path/in/jar.mp3") for using resource files that are in the jar. But this doesn’t seem to work if I want to select a file from a certain location in my file system like C:\something.mp3

Can somebody help me on this one?

Answer 1

It seems you dont have file name of the temp files . When you was running your program in eclipse that instance was creating a processing files, but after you made a runable you are not able to read those file that instance in eclipse created, You runable file can create its own temp file and can process them,
To make temp files globe put there (path + name ) entries in some db or property file

For example of you will create a temp file from the blow code

File tempfile = File.createTempFile("out", ".txt", new File("D:\\"));           
FileWriter fstream = new FileWriter(tempfile);//write in file
out = new BufferedWriter(fstream);

the out will not be out.txt file it will be

out6654748541383250156.txt // it mean a randum number will be append with file

and you code in runable jar is no able to find these temp files