Problemas com SwingWorker

import java.awt.Dimension;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.SwingWorker;
import java.util.List;
 
public class Numerar implements Runnable {

    JFrame jf = new JFrame("Numerando...");
    JPanel jp = new JPanel();
    JProgressBar carregador = new JProgressBar(0, 100000);

    public void run() {

        final SwingWorker worker = new SwingWorker<Void, Integer>() {
            protected Void doInBackground() throws Exception {
                for(int i=0; i <= 100000; i++){
                    System.out.println("Numero: "+i);
                    publish(i);
                }
                return null;
            }

            protected void process(List<Integer> progress){
                carregador.setValue(progress.get(progress.size()-1));
            }  
 
            protected void done() {
                super.done();
                JOptionPane.showMessageDialog(null,
                        "O processo foi concluido com sucesso!", "Aviso",
                        JOptionPane.INFORMATION_MESSAGE);
                jf.dispose();
            } 			
        };
 
        worker.execute();
        carregador.setValue(worker.getProgress());
        carregador.setStringPainted(true);
        carregador.setPreferredSize(new Dimension(200, 20));

        jp.setBorder(BorderFactory.createTitledBorder("Carregando..."));
        jp.add(carregador);
        jf.getContentPane().add(jp);
        jf.pack();
        jf.setResizable(false);
        jf.setVisible(true); 
    }
 
    public static void main(String[] args) {
        javax.swing.SwingUtilities.invokeLater(new Numerar()); 		 
    }

 }