jasperviewer closes main application

at the time of closing jasperviewer report that is opened up, main application window is closed at the same time.To get rid form this problem:

in the constructor of JasperViewer there is boolean indicating whehter it should perform an exit on close.

jasperReport = JasperCompileManager.compileReport( "reportloh.jrxml");
jasperPrint = JasperFillManager.fillReport( jasperReport, parameters, conn);
JasperViewer jv = new JasperViewer( jasperPrint, false );
jv.viewReport( jasperPrint, false );