java日期类

 

 

 

Date ,  DateFormat, Calendar 三者之间关系：

 

	public static void main(String[] args) throws ParseException {
		
		Calendar calendar = java.util.Calendar.getInstance();
		System.out.println(calendar.get(Calendar.YEAR));
		
		// string ---> dateformat ---> date 
		String time = "1920-11-11";
		DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
		Date date = format.parse(time);
		// date ---> calendar 
		calendar.setTime(date);
		System.out.println(calendar.get(Calendar.YEAR));
		
		
	}