Как прочитать параметр из файла txt?

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import java.util.Properties;
...
 
public class PropDemo {
 
    private static Properties loadPropertiesFromFile(String fileName) throws IOException {
        Properties result = new Properties();
        if (new File(fileName).exists()) {
            try (InputStream inputStream = new FileInputStream(fileName)) {
                result.load(inputStream);
            }
        }
        return result;
    }
 
    private static void savePropertiesToFile(Properties props,
            String comment, String fileName) throws IOException {
        try (OutputStream outputStream = new FileOutputStream(fileName)) {
            props.store(outputStream, comment);
        }
    }
 
    public static void main(String[] args) throws IOException {
        String userConfigFileName
                = Paths.get(System.getProperty("user.dir"), "user.cfg").toString();
 
        Properties userProps = loadPropertiesFromFile(userConfigFileName);
 
        System.out.format("userid: %s\n", userProps.getOrDefault("userid", ""));
        System.out.format("music: %s\n", userProps.getOrDefault("music", "1"));
        System.out.format("sound: %s\n", userProps.getOrDefault("sound", "1"));
        System.out.format("demo: %s\n", userProps.getOrDefault("demo", "0"));
 
        //................
        
        Random rnd = new Random();
        userProps.setProperty("userid", UUID.randomUUID().toString());
        userProps.setProperty("music", Integer.toString(rnd.nextInt(2)));
        userProps.setProperty("sound", Integer.toString(rnd.nextInt(2)));
        userProps.setProperty("demo", Integer.toString(rnd.nextInt(2)));
 
        savePropertiesToFile(userProps, "USER PROPERTIES", userConfigFileName);
    }
}

        int randomInt = rnd.nextInt(2);
        String randomIntAsString = Integer.toString(randomInt);
        userProps.setProperty("music", randomIntAsString);

String userConfigFileName = Paths.get(System.getProperty("user.dir"), "user.cfg").toString();