Java report Compiler (Jasper)

package rnb.cell;

import java.awt.HeadlessException;
import java.sql.Connection;
import java.util.HashMap;
import java.util.Map;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperCompileManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.view.JRViewer;


/**
 *
 * @author azhar
 */
public class Report_controler extends JFrame{
 void Showreport(String tgl){
      try {
         Connection c = koneksi.getkoneksi();
        
         
            Map parameter = new HashMap();
            parameter.put("tgl", tgl); \\ Untuk mengirimkan parameter
            parameter.put("Tglview", tgl);
            JasperReport jasperReport = (JasperReport)JasperCompileManager.compileReport(System.getProperty("user.dir").toString()+"\\Report\\Laporantrx.jrxml");
                JasperPrint print = JasperFillManager.fillReport(jasperReport, parameter, c);
                JRViewer viewer = new JRViewer(print);
                this.add(viewer);
                this.setVisible(true);
                this.setSize(1000,700);
                this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
               
        }catch(JRException | SecurityException | HeadlessException e){JOptionPane.showMessageDialog(null,e.toString());} finally {
       }
   
   
}}