如何在java中检查单词是否以空格或下划线开头，或者是行/字符串的开头？

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

public class WordCheck {
    public static void main(String[] args) {
        String word = " example";
        String pattern = "^[\\s_].*";

        Pattern regex = Pattern.compile(pattern);
        Matcher matcher = regex.matcher(word);

        if (matcher.find()) {
            System.out.println("单词以空格或下划线开头");
        } else {
            System.out.println("单词不以空格或下划线开头");
        }
    }
}