最优雅的方法来检测String是否是一个数字？

^-?\d+$

import re

def is_number(s):
    return bool(re.match(r'^-?\d+$', s))

# 示例用法
print(is_number("123"))  # True
print(is_number("-456"))  # True
print(is_number("789.0"))  # False

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

public class Main {
    public static boolean isNumber(String s) {
        Pattern pattern = Pattern.compile("^-?\\d+$");
        Matcher matcher = pattern.matcher(s);
        return matcher.matches();
    }

    public static void main(String[] args) {
        System.out.println(isNumber("123"));  // true
        System.out.println(isNumber("-456"));  // true
        System.out.println(isNumber("789.0"));  // false
    }
}

function isNumber(s) {
    return /^-?\d+$/.test(s);
}

// 示例用法
console.log(isNumber("123"));  // true
console.log(isNumber("-456"));  // true
console.log(isNumber("789.0"));  // false