iReport cannot validate null value?

[steven.cyc]

Hi, I'm new to iReport, and working in the version of iReport 4.0.

I have a field expression to handle the null field as below:
 $F{Profit} == null ? "N/A": new DecimalFormat("#,##0.00").format($F{Profit}

the field is expected to display "N/A" if null value, but iReport cannot validate the null value, it displays EMPTY.
I have checked that the "Blank When Null" is enabled, so I have already unchecked it..
but the report diaply  "null" finally, not "N/A"

is it a bug of iReport ?    could you have any suggestion?
I'm using Groovy, because the standard of our project is using Groovy. 

Please Help..

 

[sanbez]

Check this report in your environment. In my case it's worked perfect (JR 4.8.0)

<?xml version="1.0" encoding="UTF-8"?> select 1.12 Profit, 'not null field' descr from dualunion all select null, 'null field' from dual PROFIT DESCR $F{PROFIT} == null ? "N/A" : new DecimalFormat("#,##0.00").format($F{PROFIT}) $F{DESCR}

[sanbez]

<?xml version="1.0" encoding="UTF-8"?>

select 1.12 Profit, 'not null field' descr from dual</p><p> union all select null, 'null field' from dual

PROFIT

DESCR

$F{PROFIT} == null ? "N/A" : new DecimalFormat("#,##0.00").format($F{PROFIT})

$F{DESCR}