Java Converts disparate character codes to the same character code at once

Converts different character codes of Java files to the same character code at once and saves

    public void writeFile() throws IOException {
        Files.list(Paths.get("dir"))
            .filter(p -> p.toFile().getName().endsWith(".txt"))
            .forEach(p -> writeFile(p));

        Files.find(Paths.get("dir")
                , Integer.MAX_VALUE
                , (p, a) -> p.toFile().getName().endsWith(".txt"))
            .forEach(p -> writeFile(p));
    }

    public void writeFile(Path path) {
        try {
            Files.write(path
                    , readFile(path).stream().collect(Collectors.joining("\r")).getBytes(StandardCharsets.UTF_8));
        } catch (IOException e) {
            throw new IllegalStateException("write error file : " + path.toAbsolutePath(), e);
        }
    }

    public List<String> readFile(Path path) {
        for (Charset charset: Charset.availableCharsets().values()) {
            try {
                return Files.readAllLines(path, charset);
            } catch (MalformedInputException e) {
                e.printStackTrace();
                continue;
            } catch (IOException e) {
                throw new IllegalStateException("read error file : " + path.toAbsolutePath(), e);
            }
        }
        throw new IllegalStateException("read error file : " + path.toAbsolutePath());
    }