Java.lang.VerifyError: Cannot inherit from final class

package digitacoes;



import com.crystaldecisions.reports.sdk.*;
import com.crystaldecisions.sdk.occa.report.lib.*;
import com.crystaldecisions.ReportViewer.*;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class ReportViewerFrame extends JFrame {

	
	private  int XPOS = 75;
	private  int YPOS = 50;
	private  int larg = 750;
	private  int alt = 600;

	//Crystal Report thick-client viewer object that will be embedded into the JFrame.
	private ReportViewerBean reportViewer = new ReportViewerBean();
	//This report will be viewed in the thick-client viewer.
	private ReportClientDocument reportClientDoc = new ReportClientDocument();

	/**
	 * Constructs and launches the new frame.
	 */
	public ReportViewerFrame(ReportClientDocument reportClientDoc) throws Exception {

		//Initialize frame properties.
		this.setResizable(true);
		this.setLocation(XPOS, YPOS);
		this.setSize(larg, alt);
		this.setTitle("Crystal Report Java Viewer");

		//Add GUI components to the frame including the ReportViewerBean.
		addComponents();

		//Add GUI listeners to the frame.
		addListeners();

		//Set the report that the ReportViewerBean will display.
		this.reportClientDoc = reportClientDoc;
		reportViewer.setReportSource(reportClientDoc.getReportSource());
		reportViewer.init();
		reportViewer.start();

		//Display the frame.
		this.setVisible(true);

	}

	private void addComponents() {

	  	//Create new panel and add the ReportViewerBean to it.
		Container cp = getContentPane();
		cp.setLayout(new BorderLayout());
		cp.add(reportViewer);

	}


	private void addListeners() {


		addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				quit();
			}
		});

	}


	public void quit() {

	  	try {
	  		//Release report.
	  		reportClientDoc.close();
			System.exit(0);
	  	}
	  	catch(ReportSDKException ex) {
	  		ex.printStackTrace();
	  	}

	}

}

package digitacoes;



import com.crystaldecisions.reports.sdk.*;
import com.crystaldecisions.sdk.occa.report.lib.*;


import java.awt.Color;
import javax.swing.*;

public class JRCViewReport {

	public static String REPORT_NAME = "D:\\Java\\Projetos\\RPT\\Report1.rpt";

	public static void launchApplication() {

            try {


            ReportClientDocument reportClientDoc = new ReportClientDocument();
            reportClientDoc.open(REPORT_NAME, 0);


            new ReportViewerFrame(reportClientDoc);

            }
            catch(ReportSDKException ex) {
            System.out.println(ex);
            }
            catch(Exception ex) {
            System.out.println(ex);
            }

	}

	public static void main(String [] args) {

		//Event-dispatching thread to run Swing GUI.  This is good practice for Swing applications
		//to help ensure that events are dispatched in a predicatable order.
		//For more information on using this method, refer to the SUN site below for more details:
		//http://java.sun.com/products/jfc/tsc/articles/threads/threads1.html
		SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				//Hand-off to worker function to start application.
				launchApplication();
			}
		});

	}

}