No Such File exception in Runnable Jar file

Question

I am trying to create a runnable jar file. My project includes models.txt file. My project works perfectly in eclipse with no error but when exported to a runnable jar file, It doesn't work. I hereby attach the error and the piece of code where the file is been called.

public static HashMap<String, RenderModel>  getModelList(String file) throws IOException {
    List<String> data;
    HashMap<String, RenderModel> namesToModels = new HashMap<String, RenderModel>();

    if (file != null) {
        data = Files.readAllLines(Paths.get(file), StandardCharsets.UTF_8);
    } else {
        String path = "models/models.txt";
        data = Files.readAllLines(Paths.get(path),  StandardCharsets.UTF_8);
    }

    Iterator<String> dataIterator = data.iterator();
    while (dataIterator.hasNext()) {
        String dataLine = dataIterator.next();
        System.out.println(dataLine);
        String[] line = dataLine.split("; ");
        String key = line[0];
        String valueObj = line[1];
        String valueMtl = line[2];
        float scale = Float.parseFloat((String) line[3]);
        RenderModel v = new RenderModel(valueObj, valueMtl, scale);
        namesToModels.put(key, v);
    }
    RenderModel v =  new RenderModel("custom", "custom", 1.0f);
    namesToModels.put("Choose Model from file", v);
    return namesToModels;
}

Error Image:

Error Image

In eclipse, I have src folder and everything works fine. how to create src folder in jar. — Ankit1016, Oct 11 '16 at 09:47

score 1 · Accepted Answer · answered Oct 11 '16 at 09:51

If the files are in the Jar and you cannot read them, try accessing the files by doing:

getClass().getClassLoader().getResource(fileName);

Use this instead for static methods:

ClassName.class.getClassLoader().getResource(fileName);

Where fileName is the name of the file and ClassName the name of the class from which the statement is called.

score 0 · Answer 2 · answered Oct 11 '16 at 09:43

In your code the path of the model.txt is 'src/models/model.txt'. When your project is packaged the src folder is not included usually. Then you must change the file location; could be better put the file outside the jar, but inside the java classpath.

score 0 · Answer 3 · edited May 23 '17 at 10:32

It does not work because you do not have any file on the path src/models/models.txt when you run your jar else where, this path is only present in your IDE (ofcourse you can place your jar in a location from where it can reach that path, but this is not how it is supposed to be), when you package your project into a jar file it is packed in the package models and you can if you want to have it as default file read it via classpath.

No Such File exception in Runnable Jar file

3 Answers3