Java代码如何将Date(日期)转换为Calendar(日历)呢?

Date和Calendar互转

Date转Calendar对象的实现思路:
    calendar.setTime(date)

Calendar对象转Date对象的实现思路:
    Calendar calendar = Calendar.getInstance();
	Date newDate = calendar.setTime(date);

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
 
public class DateAndCalendar {
	public static void main(String[] argv) throws ParseException {
 
		//1. Create a Date from String
		SimpleDateFormat sdf = new SimpleDateFormat("dd-M-yyyy hh:mm:ss");
		String dateInString = "18-03-2022 08:32:46";
		Date date = sdf.parse(dateInString);
                DateAndCalendar obj = new DateAndCalendar();
 
		//2. Test - Convert Date to Calendar
		Calendar calendar = obj.dateToCalendar(date);
		System.out.println(calendar.getTime());
		
		//3. Test - Convert Calendar to Date
		Date newDate = obj.calendarToDate(calendar);
		System.out.println(newDate);
 
	}
 
	//Convert Date to Calendar
	private Calendar dateToCalendar(Date date) {
 
		Calendar calendar = Calendar.getInstance();
		calendar.setTime(date);
		return calendar;
 
	}
 
	//Convert Calendar to Date
	private Date calendarToDate(Calendar calendar) {
		return calendar.getTime();
	}
}