java date 時間差

java date 時間差

java.text.DateFormat format1 = new java.text.SimpleDateFormat("yyyy-MM-dd hh:mm:ss");        Calendar nowTime = Calendar.getInstance();              String nowDate = format1.format(new Date()); //得到目前時間             Calendar afterTime = Calendar.getInstance();              afterTime.add(Calendar.DATE, -5); //當前月份+5                  String afterDate =  format1.format((Date) afterTime.getTime());           System.out.println("今天時間"+nowDate);             System.out.println("修改後的 時間"+afterDate);