如何在Java中将以下字符串转换为日期或日历对象？

import java.text.SimpleDateFormat;
import java.util.Calendar;

public class StringToDate {
    public static void main(String[] args) {
        String dateString = "2022-01-01";
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
        try {
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(formatter.parse(dateString));
            System.out.println("日期对象: " + calendar.getTime());
            System.out.println("日历对象: " + calendar);
        } catch (ParseException e) {
            e.printStackTrace();
        }
    }
}