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PO
primarykey
Id
7661966
data
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0
AnswerCount
0
ClosedDate
CommentCount
3
CommunityOwnedDate
CreationDate
2011-10-05T13:25:09.743
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0
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2011-10-05T14:16:33.533
LastEditDate
2011-10-05T14:16:33.533
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460785
OwnerUserId
460785
ParentId
7661902
PostTypeId
2
Score
2
ViewCount
0
LastEditorDisplayName
text
Body
The issue is probably that <code>sdf.parse(date);</code> will be null if <code>date</code> does not match the pattern. If you change the pattern of the SimpleDateFormat object but don't change the format of the date you are parsing the ParseException will be thrown and <code>date_out</code> will be null. <code>sdf.format()</code> will then throw a NullPointerException when you try to format the null string. Based on your comment I think a bit more explanation is required with some examples - so I'm editing my answer appropriately... SimpleDateFormat applyPattern changes the pattern of the SimpleDateFormat object it acts in the same way as the string in the constructor does, that is, it tells the Formatter which pattern to expect / use for output. For what I think you want, you need two SimpleDateFormatters, an input one and an output one. eg. <pre><code>SimpleDateFormat sdfInput = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.S"); SimpleDateFormat sdfOutput = new SimpleDateFormat(yyyy MM dd"); Date date_out = null; try { date_out = sdfInput.parse(date); } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } String myOutputtedDate = sdfOutput.format(date_out); </code></pre> Having said that I guess you could put applyPattern after the parsing, and before the output like so... <pre><code>SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.S"); String reformattedDate = ""; Date date_out = null; try { date_out = sdf.parse(date); } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } sdf.applyPattern("yyyy MM dd"); if (date_out != null) { reformattedDate = sdf.format(date_out); } </code></pre> Hope this helps a bit more.
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1. POapplyPattern() in SimpleDateFormat gives NullPointerEcxeption with white space in java
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1. USMatt Fellows
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1. USMatt Fellows
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