1、Java中时间加减的比较在JAVA中日期的计算与比较可以使用Date和DateFormat来解决public class TestDate{ public static void main(String[] args){ try{ Date date=new Date(); DateFormat df=DateFormat.getDateTimeInstance(); String now=df.format(date); System.out.println("现在时间:"+now)
2、; System.out.println("现在时间是否在16:00之前:"+date.before(df.parse("2008-07-09 16:00:00"))); } catch(ParseException e){System.out.print(e.getMessage()); } }}方法一：DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");try{ Date d1 = df.parse("2008-03
3、-26 13:31:40"); Date d2 = df.parse("2008-01-02 11:30:24"); long diff = d1.getTime() - d2.getTime(); long days = diff / (1000 * 60 * 60 * 24);}catch (Exception e){}方法二：SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); java.util.
4、Date now = df.parse("2008-03-26 13:31:40"); java.util.Date date=df.parse("2008-01-02 11:30:24"); long l=now.getTime()-date.getTime(); long day=l/(24*60*60*1000); long hour=(l/(60*60*1000)-day*24); long min=((l/(60*1000))-day*24*60-hour*60); lo
5、ng s=(l/1000-day*24*60*60-hour*60*60-min*60); System.out.println(""+day+"天"+hour+"小时"+min+"分"+s+"秒");方法三：SimpleDateFormat dfs = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); java.util.Date begin=dfs.parse("2008-01-02 11:30:24"); java.util.Date end =
6、dfs.parse("2008-03-26 13:31:40"); long between=(end.getTime()-begin.getTime())/1000;//除以1000是为了转换成秒 long day1=between/(24*3600); long hour1=between%(24*3600)/3600; long minute1=between%3600/60; long second1=between%60/60; System.out.println(""
