Re: Date and null

Lew <>
Mon, 21 Apr 2008 23:59:23 -0400
<> wrote:

I have a Date variable in a JavaBean that works with a Oracle
If there is a Date value in the database it shows in the JSP with no
But if there is no value in the Date value it gives me a null error in
the JSP.
How do I account for null with a Date object?

Test the reference for "== null".

If there is not Date value I still want the page to show the Date
Title with nothing there.
For example:
JSP view example if there is a Date value:
Submit Date: June 25, 2007

JSP view example if there is not a Date value should show like this
but it doesnt show and gives me a null error:
Submit Date:

Well, what do you expect when you attempt to format a null value?

My classes and JSP:


   private Date subDate;

    public String getSubDate(){
        SimpleDateFormat formatter = new SimpleDateFormat ("MMMM dd,

You could set 'formatter' as a static final variable, since you never change it.

        return formatter.format(this.subDate);

   Also tried this just to put a value in there if null but it didnt
       public String getSubDate(){
        if((subDate == null)

This won't even compile. Are you sure this is what your code was?

             subDate = null;

OK, having ascertained via the 'if' that 'subDate' is null, you then
redundantly set it to null yet again, accomplishing no change.

        SimpleDateFormat formatter = new SimpleDateFormat ("MMMM dd,
        return formatter.format(this.subDate);

It seems that you can't format a null date. Just return "" if 'subDate == null'.



    public void setSubDate(String subDate){
        this.subDate= subDate;

Helper class:

            AddressRowBean row = new AddressRowBean();

JSP Bean call:

Submit Date: <jsp:getProperty name="projectObject"
property="subDate" />

If you use Expression Language (EL), it does the right thing with null values.

   Submit Date: <c:out value="${subDate}" />

However, SimpleDateFormat will still blow up on the null reference.


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