如何在javafx中突出显示使用正则表达式找到的word

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.TextArea;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class HighlightWords extends Application {

    private static final String TEXT = "This is a sample text with some words.";

    @Override
    public void start(Stage primaryStage) {
        Label label = new Label("Enter a word to highlight:");
        TextArea textArea = new TextArea();
        textArea.setWrapText(true);

        VBox root = new VBox(label, textArea);
        Scene scene = new Scene(root, 400, 300);
        primaryStage.setScene(scene);
        primaryStage.show();

        textArea.textProperty().addListener((observable, oldValue, newValue) -> {
            String wordToHighlight = newValue.trim();
            String highlightedText = highlightWord(TEXT, wordToHighlight);
            textArea.setText(highlightedText);
        });
    }

    private String highlightWord(String text, String word) {
        Pattern pattern = Pattern.compile("\\b" + word + "\\b", Pattern.CASE_INSENSITIVE);
        Matcher matcher = pattern.matcher(text);

        StringBuilder highlightedText = new StringBuilder();
        int lastIndex = 0;
        while (matcher.find()) {
            highlightedText.append(text, lastIndex, matcher.start());
            highlightedText.append("<b>").append(text, matcher.start(), matcher.end()).append("</b>");
            lastIndex = matcher.end();
        }
        highlightedText.append(text.substring(lastIndex));

        return highlightedText.toString();
    }

    public static void main(String[] args) {
        launch(args);
    }
}