Java path in Linux

Question

I have a bit problem, and i dont seem to understand what is causing it. i have a folder in my project, and in that folder i have a class, and i have a resource file (in this case jasper report). but the only way i can access file is with absolute path or some path that starts from root of my project.

String path = "src/main/java/Views/LagerMain/lager.jrxml";

^^this works, both my class LagerController and lager.jrxml are under LagerMain folder, but when i try to do this :

String path = "lager.jrxml";

i have an error that file is not found. I tried googling this to have a better understanding but i found nothing.

Bottom line, why cant i access my file, from class when they are both on same place, why does not relative path work.

Cardinal System · Accepted Answer · 2017-04-27 22:18:17Z

If the main class is in a different directory, then the program will try to accesslager.jrxml there instead of the directory of the regular class.

For regular-class directory:

String path = new String(MyClass.class.getProtectionDomain().getCodeSource().getLocation()
.getPath() + System.getProperty("line.separator") + "lager.jrxml");

If that doesn't work, try this:

// your directory
File f = new File("src");
File[] matchingFiles = f.listFiles(new FilenameFilter() {
    public boolean accept(File dir, String name) {
        return name.startsWith("lager") && name.endsWith("jrxml");
    }
});

If you have more than one file with the name lager.jrxml, then this method will return both of them and you will need to use a for to cycle through them. Otherwise, you can just use

String path = new String(matchingFiles[0].getAbsolutePath())

For main-class directory:

String path = new String(System.getProperty("user.dir")
 + System.getProperty("line.separator") + "lager.jrxml");

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