java中日期的变动

package com.ce.shi.test;

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

public class aa {
	public static void main(String[] args) throws ParseException {
		SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd");
		Calendar c = Calendar.getInstance();
		System.out.println("当前日期:" + sf.format(c.getTime()));
		c.add(Calendar.DAY_OF_MONTH, 1);
		System.out.println("增加一天后日期:" + sf.format(c.getTime()));
		
	}
}