Strange date effect

[DaveMere]

Hi there.

I'm retrieving a string from a webform and processing it in a servlet. Testing has revealed a rather odd effect; if a supposedly invalid date such as "01/14/2005" is input the code accepts this as 01 Feb 2006. Equally "01/17/2005" is accepted as 01 May 2006.

The java seems to be just adding the any extra months after 12 into subsequent years. This is not going to pass testing!

Here's the code:

java.util.Date datDate = datJava.parse(request.getParameter("donordate"));
this.strDonDate = datSyb.format(datDate);
System.out.println(strDonDate);

Output of this is as above.

Anyone seen this effect before? And know how to get around it?

Thanks, DaveMere

[ractoc]

Why don't you just use a SimpleDateFormatter? This formatter should throw the correct exception in the case you stated above.

[DaveMere]

Thanks for your reply ractoc. I didn't include the rest of the code! Here it is;

SimpleDateFormat datJava = new SimpleDateFormat( "dd/MM/yyyy" );
SimpleDateFormat datSyb = new SimpleDateFormat( "MMM dd yyyy" );

java.util.Date datDate = datJava.parse(request.getParameter("donordate"));
this.strDonDate = datSyb.format(datDate);
System.out.println(strDonDate);

So, am I not already using SimpleDateFormatters? Or have I made a mistake somewhere?