Calendar   calendar   =   Calendar.getInstance();

calendar.setTime(new   Date());  
                      String   year   =   String.valueOf(calendar.get(Calendar.YEAR));  
                      String   month   =   String.valueOf(calendar.get(Calendar.MONTH)+1);  
                      String   day   =   String.valueOf(calendar.get(Calendar.DATE));  
                      String   hour   =   String.valueOf(calendar.get(Calendar.HOUR));  
                      String   minute   =   String.valueOf(calendar.get(Calendar.MINUTE));  
                      String   second   =   String.valueOf(calendar.get(Calendar.SECOND));  
                      System.out.println(year+month+day+hour+minute+second);