Add a variable to column footer iReport

ireportjasper-reports

I want to add a variable to column footer of my table. It is the sum of the column values. eg: total sales, if column name is sales.

But when i try it it says variable not found for some reason.
I have positioned the table in title band because if i put it in detail band the table repeats multiplied by the number of rows in the table.
5rows = 5pages with the same table.

Can someone please help me since im new to jasper and ireport.

I am using ireport 5.0.0

Thank you

Best Answer

Make sure you have this on your xml

<field name="total_column" class="java.lang.Long"/>

and have this as your text field expression

$F{total_column}

Change the name to whatever you are using.

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