Refactor Corrector class to use private access modifier for detector field

public class Corrector {

    public TrieNode detector;

    private TrieNode detector;

    public Corrector() {

        detector = loadFile("metadata.ser");

    }

    public TrieNode getDetector() {

        return detector;

    }

    private TrieNode loadFile(String filePath) {

        TrieNode trie = new TrieNode();

        try (FileInputStream fis = new FileInputStream(filePath)) {

            resultArea.setText(result.toString());

            // Add a pop up to input the best correction for each sentence

            TrieNode node = corrector.getDetector();

            for (String sentence : sentences) {

                String sentenceNew = sentence.replaceAll("[^a-zA-Z0-9\\s]", "");

                String[] corrected = corrector.correct(sentenceNew);

                String selected = (String) JOptionPane.showInputDialog(this, "Select the best correction for the following sentence:\n  " + sentence, "Correction Selection", JOptionPane.PLAIN_MESSAGE, null, options, options[0]);

                if (selected != null) {

                    // Insert the selected correction into the trie for future reference

                    TrieNode node = corrector.detector;

                    List<String> phrases = TextProcessor.extractPhrases(selected, 2, 3);

                    for (String phrase : phrases) {

                        String[] words = phrase.split(" ");

            }

            // Serialize the trie

            byte[] serialized = corrector.detector.serialize();

            byte[] serialized = node.serialize();

            byte[] compressed = compress(serialized);

            writeToFile(compressed, "metadata.ser");