Condition check in using rendered

[Pardha Reddy]

Hi

I have basic question.

I am displaying all the values of output. I am using the below tag to display date. Whenever the date is null, it is throwing null pointer exception. I tried to use rendered to fix this. But didn't work out. Please correct my code and help me.

<hutputText id="begindate" value="#{beanInstance.beginDate}" rendered="#{! empty beanInstance.beginDate}">
<f:convertDateTime pattern="MM/dd/yyyy"/>
</hutputText>

When i change rendered ="#{false}". Its working. whenever database value for beginDate is not null it is working.

Thanks
Pardha

[Tim Holloway]

Try 'rendered="#{! (empty beanInstance.beginDate)}"'.

[Pardha Reddy]

No Luck. Same result -- Null pointer exception whenever beanInstance.beginDate is null from DB.

Thanks
Pardha

[Pardha Reddy]

Can someone reply for my earlier post.

Thanks
Pardha

[Jagadeeswara Yaramala]

Try this:

1) rendered="#{!(beanInstance.beginDate==null)}"

or

2) rendered="#{!(beanInstance.beginDate=='null')}" /* This is because null is a reserved literal in Java */

I think you should check for null which is for reference variables like Date.

[Pardha Reddy]

Both the options not working.

Thanks
Pardha

[Liangfeng Ren]

Hi, probably need you to provide the error log to see where the nullpointexception was thrown from.