I use jasperReport to generate the report in the java application. I give resultSet in jasperPrint and then the report is displayed through JViewer. Everything works fine, but there is a problem. The report is large and I would like the user to see that the computer generates a report and how much has already formed. I want to use the ProgressBar, but it is unclear what to send him. Tell me, please, how can I find it? Or propose way to view report generating process.