How to get file from my project (where code is written)

It depends on where exactly the file is in your project. A clean point to put it might be ${project.root}/resources, so create a folder and put the file there. Mark it as a "source folder" in Eclipse (project properties -> build path -> source folders). Your current setup isn't a good idea because the file will not be included in your distribution by Eclipse's compile.

Now, when you compile the code, this gets copied into the target directors (bin per default); you can check by opening it in your file browser.

So to check the file is there, you can do

Path filePath = Paths.get("resources", "readme.txt"); System.out.println(Files.exists(filePath)); 

If you need it as a File, you can do

File readmeFile = filePath.toFile(); 

This reads the file from the source project folder, so it won't be much use after you run the program somewhere else.

For that, you can use the ClassLoader:

URL readmeUrl = ClassLoader.getSystemClassLoader().getResource("resources/readme.txt")); File readmeFile = new File(readmeUrl.getFile()); 

I found answer, this works for me:

/** * Help button listener. If button is pressed, help file is opened. */ private void listenButtonHelp() { buttonHelp.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { if (Desktop.isDesktopSupported()) { File file = null; Bundle bundle = Platform.getBundle("TestProject"); IPath path = new Path("resources/readme.txt"); URL url = FileLocator.find(bundle, path, null); /* * After FileLocator, I get also this, like I commented before: * D:\\eclipse-rcp-oxygen\\eclipse\\..\\..\\..\\eclipse_oxygen_workspace\\ * TestProject\\resources\\readme.txt and before it didn't work but if * you add these lines: * url = FileLocator.toFileURL(url); * file = URIUtil.toFile(URIUtil.toURI(url)); * Like in my try bracket, it works. I guess it needs to be * converted using URIUtil. * Now it finds file, and it can be opened, also works for .html files. */ Desktop desktop = Desktop.getDesktop(); try { url = FileLocator.toFileURL(url); file = URIUtil.toFile(URIUtil.toURI(url)); // file.setReadOnly(); desktop.open(file); } catch (Exception e1) { e1.printStackTrace(); } } } }); }