java get the current system 24 hours before the time " when " array

Hello
java to get the current system time prior to 24 hours , " time" arrays such as the current system is the afternoon 16:00 to 17:00 yesterday afternoon, exactly 24 hours
Example:
[ 17 18 19 20 21 2,223,000,102,030,405 0,607,080,910,111,213 ; 14 15 16 ]
get such a total of 24 hours is dynamic if the time changes along with the corresponding data also changes .

Thank you god
------ Solution --------------------------- -----------------

  Calendar c=Calendar.getInstance();
  for(int i=0;i<24;i++){//当前时间循环24小时减下去
     System.out.println(c.get(Calendar.HOUR_OF_DAY));
     c.add(Calendar.HOUR_OF_DAY, -i);
  }
  

------ Solution ----------------- ---------------------------

Date date = new Date();
  		int nowHour = date.getHours();
  		int[] hours = new int[24];
  		for (int i = 0; i < hours.length; i++) {
  			hours[i] = (nowHour++)%24;
  		}
  		for (int j = 0; j < hours.length; j++) {
  			System.out.println(hours[j]);
  		}

------ Solution ------- -------------------------------------

Date date = new Date();
  //		System.out.println(date);
  		Calendar c = new GregorianCalendar();
  		c.setTime(date);//给Calendar对象设置时间
  		int hour = c.get(Calendar.HOUR_OF_DAY);//取得当前时间的时数

---- - Solution --------------------------------------------

import java.util.Calendar;
  
  
  public class Get24Hours {
  
  	public static void main(String[] args) {
  		Integer[] hours=new Integer[24];
  		for (int i = 0; i < 24; i++) {
  			Calendar calendar=Calendar.getInstance();
  			 calendar.add(Calendar.HOUR_OF_DAY, i);
  			 hours[i]=calendar.get(Calendar.HOUR_OF_DAY);
  		}
  		for (int i = 0; i < hours.length; i++) {
  			System.out.print(hours[i]+",");
  		}
  	}
  }