字符串中的加粗单词

/*
 * Problem: 758. Bold Words in String
 * The problem requires the use of bold tags to mark the words present in the list 'dict' within the string 's'.
 * 
 * Approach using Java Streams:
 * 1. Create a boolean array 'bold' to mark positions in the string that need to be bolded.
 * 2. Use streams to mark the positions of words found in 's'.
 * 3. Generate the result string by inserting <b> and </b> tags as needed.
 */
 
import java.util.stream.IntStream;
 
public class Solution {
    public String boldWords(String[] words, String S) {
        boolean[] bold = new boolean[S.length()];
        IntStream.range(0, words.length).forEach(i -> {
            String word = words[i];
            IntStream.iterate(S.indexOf(word), start -> start != -1, start -> S.indexOf(word, start + 1)).forEach(start -> {
                IntStream.range(start, start + word.length()).forEach(j -> bold[j] = true);
            });
        });
        StringBuilder result = new StringBuilder();
        IntStream.range(0, S.length()).forEach(i -> {
            if (bold[i] && (i == 0 || !bold[i - 1])) result.append("<b>");
            result.append(S.charAt(i));
            if (bold[i] && (i == S.length() - 1 || !bold[i + 1])) result.append("</b>");
        });
        return result.toString();
    }
}