When a JasperViewer appear and I close it, the main frame/parent also closed [duplicate]

Answer 1

Change:

JasperViewer.viewReport(jasperPrint);

To:

JasperViewer.viewReport(jasperPrint);
JasperViewer.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

It would seem theJasperViewer is using JFrame.EXIT_ON_CLOSE which will cause System.exit(n) to be called, thus ending the JVM.

By using JFrame.DISPOSE_ON_CLOSE instead, only that frame is ended & disposed of.