How to find the last index using regex of a particular word in a String?

// Java Program to Find last index 
// Using the Regex of a Particular Word in a String
import java.util.regex.Matcher;
import java.util.regex.Pattern;

// Driver Class
public class LastIndexOfWordUsingRegex {
    // Main Function
    public static void main(String[] args) {
        String inputString = "This is a sample sentence with a particular word. Another occurrence of the word.";

        // Specify the word you want to find
        String wordToFind = "word";

        // Create a pattern with the word and the end-of-input anchor
        String regex = "\\b" + Pattern.quote(wordToFind) + "\\b";
        Pattern pattern = Pattern.compile(regex);

        // Create a matcher for the input string
        Matcher matcher = pattern.matcher(inputString);

        // Find the last occurrence of the word
        int lastIndex = -1;
        while (matcher.find()) {
            lastIndex = matcher.start();
        }

        // Print the last index or indicate if the word is not found
        if (lastIndex != -1) {
            System.out.println("Last index of '" + wordToFind + "': " + lastIndex);
        } else {
            System.out.println("'" + wordToFind + "' not found in the string.");
        }
    }
}