Cannot assign value to static final variable

I am trying to create a config file system for my game, and I want the config info from the user to be stored as public static final variables in a Config class, so all classes within the game can access the config data safely. Here is the code I have written so far:

import java.io.*;
import java.util.Scanner;

public class Config {

	private static final int n = 4;
	private static String[] values = new String[n];
	public static final String MUSIC_PATH;
	public static final String SAVE_PATH;
	public static final int WIDTH;
	public static final int HEIGHT;

	public static void ini() throws FileNotFoundException, IOException  {
		File f = new File("config.txt");
		Scanner lineScanner = new Scanner(f);
		for (int i = 0; i<n; i++) {
			Scanner valueGetter = new Scanner(lineScanner.nextLine());
			valueGetter.useDelimiter(": ");
			valueGetter.next();
			values[i] = valueGetter.next();
		}
		WIDTH = Integer.parseInt(values[0]);
		HEIGHT = Integer.parseInt(values[1]);
		SAVE_PATH = values[2];
		MUSIC_PATH = values[3];

	}

}

When I try to compile the code I get the error "cannot assign a value to final variable". I am able to get the code working if I remove the final, however I would prefer not to do this as they are public variables I don't want them getting messed up or anything.

I figure there is no easy way to get around this issue with the way I have currently done it, but if anyone can look at this and tell me a way to accomplish what I want then I would appreciate

You can initialise static final fields in a static block.

So remove the ini method, and replace it with:

static {
   // the code that used to be in the ini method here...
}

Note that a static block cannot throw checked exceptions, so you need to handle the exception when creating a Scanner:

try {
    Scanner lineScanner = new Scanner(f);
    // the rest of your code...
} catch (FileNotFoundException e) {
    // handle the exception here...
    // perhaps set the fields to something default
}

I would also recommend making the fields private add getters for them. Also consider not having them static at all, and instead have a static currentConfig field that can be set with a public setter. It would look something like this:

class Config {

    private final int n = 4;
    private String[] values = new String[n];
    private final String MUSIC_PATH;
    private final String SAVE_PATH;
    private final int WIDTH;
    private final int HEIGHT;

    // getters for the private fields...

    private static Config currentConfig;

    public static Config getCurrentConfig() {
        return currentConfig;
    }

    public static void setCurrentConfig(Config currentConfig) {
        Config.currentConfig = currentConfig;
    }

    private Config(File configFile) throws FileNotFoundException {
        // initialise the final fields using the configFile's contents...
    }
}

At the start of your program you'd then do something like this:

Config.setCurrentConfig(new Config(new File("config.txt")));