Uncompiled jar works but compiled doesn't work

Question

So in Eclipse this code works:

String file_path = "accounts.accs";
File file = new File("src/puffinlump/folder_lock/"+file_path);

But when I compile it into a JAR I get this error:

Error reading file: java.io.FileNotFoundException: lock\src\puffinlump\folder_lock\accounts.accs (The system cannot find the path specified)

Why is it not working and how can I fix it?

Well the working directory for the IDE is the project folder. This contains the `src` folder, however the jar does not. You need to export that resource into the jar as well and change the path. — Obicere, Mar 13 '15 at 17:10
If I answered your question, please accept the answer with the tick underneath the voting arrows :) — condorcraft110 II, Mar 13 '15 at 22:22

score 2 · Answer 1 · answered Mar 13 '15 at 17:25

As Obicere said, the working directory is the project directory. You try to access something in the src folder, which probably doesn't exist wherever you exported your JAR. You should create a folder named folder_lock in your project directory with accounts.accs in it, then get your file with:

File file = new File("folder_lock" + File.separator + "accounts.accs");

If you need it in your JAR (which it's being exported to, given that it's in the src folder) then retrieve an InputStream from it like this:

InputStream stream = getClass().getClassLoader().getResourceAsStream("puffinlump/folder_lock/accounts.accs");

If your method is static, use

InputStream stream = MyClass.class.getClassLoader().getResourceAsStream("puffinlump/folder_lock/accounts.accs");

instead, substituting your class name over MyClass.

If you need an URL, you can retrieve one with getResource instead of getResourceAsStream.

Note that your code must be compiled to run - Eclipse compiles it by default every time you save.

Uncompiled jar works but compiled doesn't work

1 Answers1