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jasper reports - JasperReports: default value instead of 'null'

Is there any way to set a default value to a field in a report? I have a lot of String fields in a report and would like them to display "0,00" when they're null.

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Supposing the field name is "value", in the "Text Field Expression", write:

($F{value} != null) ? $F{value} : "0.00"


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