Re: Comparing time

Knute Johnson <>
Mon, 11 Aug 2008 10:21:16 -0700
mike wrote:


How can I compare time without using any date information?

I have the following.

public boolean myMethod (Date date){
boolean state = false;
String time1 = "08:00";
String time2 = "17:00";

 //Determine day
Calendar calendar = new GregorianCalendar();

int hours = calendar.get(Calendar.HOUR_OF_DAY);//0-23
int minutes = calendar.get(Calendar.MINUTE);//0-59

//I need to check that my minutes and hours are within time 1 and 2.


return state;


I had a similar problem. I was getting information tagged with a 4
digit time that I needed to compare with now. In that case I just added
the month day and year to the time string, parsed it with a simple date
format, got the time and compared them.

     // converts a string time HH:mm to a time today
     private Date StringToDate(String hourStr) throws ParseException {
         SimpleDateFormat sdf1 = new SimpleDateFormat("MMddyy");
         SimpleDateFormat sdf2 = new SimpleDateFormat("MMddyyHH:mm");
         String dateStr = sdf1.format(new Date());
         Date then = sdf2.parse(dateStr + hourStr);

         return then;

Date now = new Date();

now.getTime() ?? StringToDate("12:00");

Of course if you have to cross day boundaries you'll have to make some


Knute Johnson
email s/nospam/knute2008/

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