如何将字符串字段转换为日期字段

from datetime import datetime

string_date = "2021-08-25"
date_format = "%Y-%m-%d"

date_object = datetime.strptime(string_date, date_format)
print(date_object)

const string_date = "2021-08-25";

const date_object = new Date(string_date);
console.log(date_object);

import java.text.SimpleDateFormat;
import java.util.Date;

public class StringToDate {
    public static void main(String[] args) {
        String string_date = "2021-08-25";
        SimpleDateFormat date_format = new SimpleDateFormat("yyyy-MM-dd");

        try {
            Date date_object = date_format.parse(string_date);
            System.out.println(date_object);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}