Mine

        String fileName = "/home/toni/Data/netbeans/iReport/";
        Map map = new HashMap();
        String tgl1 = JOptionPane.showInputDialog("Mulai Tanggal");
        String tgl2 = JOptionPane.showInputDialog("Sampai  Tanggal");
        map.put("tgl1", tgl1);
        map.put("tgl2", tgl2);
        try {
            JasperCompileManager.compileReportToFile(fileName + "Nama2.jrxml");
            JasperFillManager.fillReportToFile(fileName + "Nama2.jasper", map, control.con);
            JasperViewer jasperViewer = new JasperViewer(fileName + "Nama2.jrprint", false);
            jasperViewer.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
            jasperViewer.setVisible(true);            
        } catch (Exception e) {
            e.printStackTrace();
        }