如何保留lambdas的参数类型？

import java.util.function.Function;

public class LambdaExample {
    public static void main(String[] args) {
        Function<String, Integer> stringToInt = (String s) -> Integer.parseInt(s);
        System.out.println(stringToInt.apply("123")); // 输出: 123
    }
}

from typing import Callable

def main():
    string_to_int: Callable[[str], int] = lambda s: int(s)
    print(string_to_int("123"))  # 输出: 123

if __name__ == "__main__":
    main()

using System;

class LambdaExample
{
    static void Main()
    {
        Func<string, int> stringToInt = (string s) => int.Parse(s);
        Console.WriteLine(stringToInt("123")); // 输出: 123
    }
}

import java.util.function.Function;

public class LambdaExample {
    public static void main(String[] args) {
        Function<String, Integer> stringToInt = (String s) -> Integer.parseInt(s);
        System.out.println(stringToInt.apply("123")); // 输出: 123
    }
}