I am trying to read the emails i have received today only using the javax.mail api.
Folder emailFolder = store.getFolder("INBOX");
emailFolder.open(Folder.READ_ONLY);
ReceivedDateTerm term = new ReceivedDateTerm(ComparisonTerm.EQ,new Date(Calendar.DAY_OF_MONTH));
Message[] messages = emailFolder.search(term);
The above code does not return any emails even though i do have in my inbox.
It seems that the Date constructor takes in a long which represents the milliseconds from January 1st, 1970. However, Calender.DAY_OF_MONTH seems to only return an integer representing the day of the month. I would recommend using something such as System.currentTimeMillis() to derive the date in millis.
References:
https://docs.oracle.com/javase/8/docs/api/java/util/Date.html#Date-long-
https://docs.oracle.com/javase/8/docs/api/java/lang/System.html#currentTimeMillis--
What's the difference between adding DAY_OF_MONTH or DAY_OF_YEAR to a Calendar object?
Caveat: I do not know JavaMail, and don’t understand the exact behavior of ReceivedDateTerm. But I do know date-time handling. If the goal is determine the first moment of today, read on.
Your date-time handling is incorrect.
The modern approach uses the java.time classes defined in JSR 310.
Getting the current date requires a time zone. For any given moment, the date varies around the globe by zone.
ZoneId z = ZoneId.of( "Asia/Tokyo" ) ;
LocalDate today = LocalDate.now( z ) ;
Determine the first moment. Not necessarily the time 00:00:00 as some dates in some zones start at another time such as 01:00:00.
ZonedDateTime zdt = today.atStartOfDay( z ) ;
Extract an Instant to adjust into UTC. Same moment, same point on the timeline, different wall-clock time.
Instant instant = zdt.toInstant() ;
The constructor for ReceivedDateTerm takes a java.util.Date object, having not yet been updated to the modern java.time framework.
Convert from our modern Instant to the terrible and misnamed legacy class java.util.Date.
Date d = Date.from( instant ) ;
Pass d to your JavaMail code as the starting moment for your search.
Could you try
ReceivedDateTerm term = new ReceivedDateTerm(ComparisonTerm.EQ,new Date(Calendar.getTime()));
or
SimpleDateFormat format= new SimpleDateFormat( "MM/dd/yy" );
java.util.Date dDate = format.parse("01/01/19");
SearchTerm st = new ReceivedDateTerm(ComparisonTerm.EQ,dDate );
