HashMap replaces pair key/value, why?

[lsmeteor]

I am having this problem with a HashMap: when trying to insert a new Long value using a Date as the key, my first or second pair key/value entry gets replaced with the third one even though the key is different.

		for (Iterator iter = psr.getProduction().iterator(); iter.hasNext();)
		{
			Object[] current = (Object[]) iter.next();

			Date date = new Date();
			date.setTime(((Date)current[0]).getTime());
			
			log.info("Production=> date: " + date );
			objectCal.setTime(date);
			
			Long qte = (Long) current[1];

			if(date.compareTo(today) < 0 )
			{
			    log.info("Production: " + qte + " skipped");			        
			    continue;
			}

			log.info("Production=> objectDate: " + objectCal.getTime() + ", Qte: " + qte );
			log.info("Production=> today: " + today );
			
			// If the map already contains the key, add up results.
			if( entries.containsKey( date ))
			{
				Long initial = (Long)entries.get( date );
				Long sum = new Long( qte.longValue() + initial.longValue() );
				entries.remove( date );
				entries.put( date, sum );
			}
			else
				entries.put( date, qte );
			
	        log.info("Production: " + qte + " added");
	        
		}

getProduction() is a List. In my problem, it only contains 3 items


i.e.
on the first loop, I pass a date, say "Tue Jun 14 00:00:00 EDT 2005" as the key and 45 as a Long value. It is placed in HashMap slot[6] (I can see in the debugger representation of the HashMap)

In the second loop, I pass the date as 'Wed Jun 15 00:00:00 EDT 2005' with the Long value of 5. It is placed in HashMap slot[2]

In the third loop, I pass the date as 'Thu Jun 16 00:00:00 EDT 2005' and a value of 5. It is placed in HashMap slot[6].

The code only runs through the
entries.put( date, qte ) portion in this example.


The result is that the third entry totally replaces the first one in the HashMap and I lose the first pair key/value. The indicated size of the HahMap is 2, I can only see the last 2 keys entered even though I only used different keys.

I tried to use a Hashtable instead of a HashMap, but I get the same problem. I also tried to use date.toString() as a key, same results with different indexes in the HashMap

Why is that happening? How can I go aroiund it. I need to sorted on the keys later as I am adding to the HashMap from different Lists that may not be in the same date order.