Jasper report in Jdev adf

Question

dear all,
i'm now trying to integrate jasper report in ADF..
and i'm try to code this code at bean..but its error..
public void runOracleReport(ActionEvent actionEvent) {
JRBeanCollectionDataSource ds = new JRBeanCollectionDataSource(PopulateBean.createBeanCollection());
Map parameters = new HashMap();
parameters.put("branchval", getBranchId());
try
InputStream input = new FileInputStream(new File("C:\\Users\\user\\.ireport\\4.7.0\\config\\Templates\\Report\\GenerateOfferLetter.jrxml"));
OutputStream os = new FileOutputStream(new File("C:\\Users\\user\\Desktop\\ICEMS\\Report\\offerLetter.pdf"));
JasperDesign jasperDesign = JRXmlLoader.load(input);
JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign);
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, parameters, conn);
JasperExportManager.exportReportToPdfStream(jasperPrint, os);
JasperViewer.viewReport(jasperPrint, false);
catch (JRException e) {e.printStackTrace();}
catch (Exception e) {e.printStackTrace();}
is it any connection code that i have to write..
Thank you

Answer 1

thank you very2 much..it helps me al lot..
2 questions taht i confused:
1: Is it query at adf must be same at query jasper?
2: Is it this code is valid code when i want to call more than parameters:
Map parameters = new HashMap();
parameters.put("branchval", getBranchId());
parameters.put("degreeVal", getDegreeId());
parameters.put("intakeVal", getIntakeId());
parameters.put("typeOfferVal", getTypeOfferId());
parameters.put("jasperParamenterName", "ParameterValue"); Used if you want to pass a parameter to a jasper report
JasperPrint print = JasperFillManager.fillReport(report, parameters, conn);
Thank you