显示昨天当前时刻

import java.util.*;

class AA{

      public static void main(string[] args){

                Calendar c = Calendar.getInstance();

                c.add(Calendar.DAY_OF_MONTH, -1);

                System.out.println(c.get(c.YEAR)+"年"+(c.get(c.MONTH)+1)+"月"+c.get(c.DAY_OF_MONTH)+"日"+c.get(c.HOUR) +"时"+c.get(c.MINUTE)+"分"+c.get(c.SECOND)+"秒");

      }

}