Re: Discrepancy in current hour

From:
Rhino <rchost@ymail.com>
Newsgroups:
comp.lang.java.programmer
Date:
Sat, 20 Mar 2010 20:44:55 -0700 (PDT)
Message-ID:
<3fa0b85c-08f3-413a-9e9e-63032f8eba37@q15g2000yqj.googlegroups.com>
On Mar 20, 8:54 pm, Lew <no...@lewscanon.com> wrote:

Rhino wrote:

public void testGetCurrentHour12() {

//TODO: why does this method return 9 (PM) when it is actually 8 in
this time zone right now?
  int currentHour = dateTimeUtils.getCurrentHour12HourClock();
  int expectedHour = 8;
  assertTrue("The actual hour (12 hour clock), " + currentHour + ",
does not equal the expected hour, " + expectedHour,
currentHour==expectedHour);
  }


Just out of curiosity, if you put, just after the declaration of
'expectedHour', the line

   Calendar calinst = Calendar.getInstance()
   int calendarHour = calinst.get( Calendar.HOUR );

what does it give you?

While we're at it, what do

   calinst.getTimeZone.getDisplayName()
and
   calinst.getTimeZone.getOffset( calinst.getTimeInMillis() )

return?


After changing the expected result to one hour later than it actually
is, I amended the test case as follows:

-----------------------------------
public void testGetCurrentHour12() {

//TODO: why does this method return 9 (PM) when it is actually 8 in
this time zone right now?
  int currentHour = dateTimeUtils.getCurrentHour12HourClock();
  int expectedHour = 12;
  assertTrue("The actual hour (12 hour clock), " + currentHour + ",
does not equal the expected hour, " + expectedHour,
currentHour==expectedHour); //$NON-NLS-1$ //$NON-NLS-2$
  Calendar calinst = Calendar.getInstance();
  int calendarHour = calinst.get( Calendar.HOUR );
  System.out.println("calendarHour: " + calendarHour);
  System.out.println("calinst.getTimeZone().getDisplayName() is: " +
calinst.getTimeZone().getDisplayName());
 
System.out.println("calinst.getTimeZone().getOffset(calinst.getTimeInMillis=
())
is: " + calinst.getTimeZone().getOffset( calinst.getTimeInMillis() ));
  }

-----------------------------------

The result from executing it is:

-----------------------------------
calendarHour: 0
calinst.getTimeZone().getDisplayName() is: Eastern Standard Time
calinst.getTimeZone().getOffset(calinst.getTimeInMillis()) is:
-14400000
-----------------------------------

Are we agreed that these test cases are okay?


I wonder why you write a utility method to get the current hour when the
standard API already provides a one-line way to do so.


I must have missed that way in the standard API. Can you remind what
it is? I'm not sure which class you're thinking of....

--
Rhino

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