获得任意时间的下一天时间

import java.util.Calendar;
import java.util.Date;
public class  {
    public static void main(String[] args) {
        
        Calendar now = Calendar.getInstance();
      //或Date now = new Date();
      System.out.println(getNextDay(now));
   }
   private static Date getNextDay(Calendar now) {
       Date dateNow = now.getTime(); //将Calendar类转换为Date类
     long base = 1;
        //用毫秒构造新的日期其中1为之后的一天
       long addTime = base * 1 * 24 * 60 * 60 * 1000;
        Date date = new Date(dateNow.getTime() + addTime);
     //或 Date date = new Date(now.getTime().getTime() + addTime);
       return date;
   }
}