boolean wasDateOnly = false;
Date dt = null;
SimpleDateFormat formatter[] = new SimpleDateFormat[]{
	new SimpleDateFormat("yyyy/mm/dd HH:mm:ss.SSS"),
	new SimpleDateFormat("yyyy/mm/dd HH:mm:ss"),
	new SimpleDateFormat("yyyy/mm/dd HH:mm"),
	new SimpleDateFormat("yyyy/mm/dd")
	}; 

for (int counter = 0; dt == null && counter < formatter.length; counter++) { 
	try {
		dt = formatter[counter].parse((String) value);
		if (counter == formatter.length - 1)
			wasDateOnly = true;
	} catch (ParseException e) {
	}
}

if (dt != null) {
	... do stuff with the dt object here ... like stuffing into a Calendar ...
}