从给定字符串中提取单词的Java Regex

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

public class WordExtractor {
    public static void main(String[] args) {
        String input = "Hello, world! This is a sample string.";

        // 定义正则表达式，匹配单词
        String regex = "\\b\\w+\\b";

        // 创建Pattern对象
        Pattern pattern = Pattern.compile(regex);

        // 创建Matcher对象
        Matcher matcher = pattern.matcher(input);

        // 循环匹配并提取单词
        while (matcher.find()) {
            String word = matcher.group();
            System.out.println(word);
        }
    }
}