如何通过java获取单词bookmark之前的所有文本内容？

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class TextReader {
    public static void main(String[] args) {
        String filePath = "path/to/your/text/file.txt";
        String targetWord = "bookmark";
        String textBeforeBookmark = "";

        try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) {
            String line;
            int bookmarkLine = -1;

            while ((line = reader.readLine()) != null) {
                if (line.contains(targetWord)) {
                    bookmarkLine = reader.getLineNumber();
                    break;
                }
                textBeforeBookmark += line + "\n";
            }

            if (bookmarkLine != -1) {
                System.out.println("Text before bookmark (line " + bookmarkLine + "):");
                System.out.println(textBeforeBookmark);
            } else {
                System.out.println("Bookmark not found in the text.");
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}