Java IO: Resource file getting modified in IDE but not in jar

Question

I am successfully able to read and write to a file in eclipse. I am also able to read from a file in the jar. However, I am not able to write to the file in the jar. It is located in a class folder called res. I have also unzipped the jar file and it contains the file I need to write to but it is not modified after the first run.

How can I do this?

I have tried BufferedWriter and PrintWriter but no effect. I tried usingFileOutputStream but I cannot construct it using getClass().getResourceAsStream(path) as it returns an InputStream.

Please see this question if it solves your issue: [How can an app use files inside the JAR for read and write?](http://stackoverflow.com/questions/5052311/how-can-an-app-use-files-inside-the-jar-for-read-and-write) — Raman Sahasi, Sep 13 '16 at 05:19
I have seen this question before and the answers in it did not help me a bit! — ARJAV GARG, Sep 13 '16 at 05:22
Nothing will help you. What you're attempting is impossible. Resources are read-only. Redesign: rethink. — user207421, Sep 13 '16 at 06:06

score 0 · Answer 1 · answered Sep 13 '16 at 05:33

0

Jar is an archive, you are not supposed to write into the file of a jar. You write to a file outside and create a jar later.

answered Sep 13 '16 at 05:33

ravthiru

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Isn't there some relative path to which I can write or read from? I really want it to work in different computers even if the file is outside the jar – ARJAV GARG Sep 13 '16 at 05:43
you can use System.getProperty("java.io.tmpdir") to write to file to tmp directory. – ravthiru Sep 13 '16 at 05:50
What should I do then? I am a rookie – ARJAV GARG Sep 13 '16 at 05:51

Java IO: Resource file getting modified in IDE but not in jar

1 Answers1