Como adicionar um JComboBox como parâmetro para um relatório ireport?[Resolvido]

try{
      HashMap<String,Object> parametros = new HashMap<String, Object>();   
Object para = comboBox.getSelectedItem().toString();
    Connection  conn = (Connection) ConnectDB.conexaoDB();
    String caminho =("src/ireport/exemplo.jasper"); 
    JasperPrint jasperprint = null;
    parametros.put("generoo", para);
    jasperprint = JasperFillManager.fillReport(caminho, parametros, conn);
    //java.io.InputStream jasperStream = Thread.currentThread().getContextClassLoader().getResourceAsStream("src/ireport/report1.jasper");
    //JasperReport report = (JasperReport) JRLoader.loadObject(jasperStream);

    //JasperReport jasperreport = JasperCompileManager.compileReport(/ireport/report1.jasper");



    JasperViewer view = new JasperViewer(jasperprint, false);
    view.setVisible(true);

}catch(JRException e){
    JOptionPane.showMessageDialog(null, "Ocorreu um erro"+e.getMessage()+e.getLocalizedMessage());
}}`