Count number of rows where a field is a specific value

Question

How do I count how many rows there are where the address field is null (or any other value), and then print the total in the Summary band?

I\'ve tri

Answer 1

Add a variable with these properties:

Variable class : java.lang.Integer
Caculation : Sum
Reset Type : Report
Increment type : Group
Increment group : YourGroupName
Variable expression : $F{yourField}.equals("") ? 0 : 1

Answer 2

Declare a variable $V{countNull} with properties:

Variable class = java.lang.Integer
Calculation = Sum
ResetType = Report
Increment type = None
Variable expression = $F{address} != null ? 0 : 1

Put $V{countNull} into the Summary band.

Put $V{countNull} into Detail band to see its calculation (for debugging).