如何在java处理中从外部文件中选择随机单词？

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Random;

public class RandomWordSelector {
    public static void main(String[] args) {
        // 读取外部文件并存储到ArrayList中
        ArrayList<String> wordList = new ArrayList<>();
        try (BufferedReader reader = new BufferedReader(new FileReader("wordlist.txt"))) {
            String line;
            while ((line = reader.readLine()) != null) {
                wordList.add(line);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

        // 生成随机索引值
        Random random = new Random();
        int randomIndex = random.nextInt(wordList.size());

        // 获取随机单词
        String randomWord = wordList.get(randomIndex);

        // 输出随机单词
        System.out.println("Random word: " + randomWord);
    }
}