JProgressBar e JButton [RESOLVIDO]

import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;
public class Barra extends JFrame{
JFrame jf;
JProgressBar jp;
JButton bt;
void Barra(){
    jf = new JFrame("Motores  INICIO 28/02/2011");
    jf.setLocation(277,350);
    jf.setLayout(null);
    jf.getContentPane().setBackground(Color.YELLOW);
    jf.setSize(777, 333);
    jf.setDefaultCloseOperation(EXIT_ON_CLOSE);

    bt = new JButton();
    jf.add(bt);
    bt.setBounds(40,40, 230, 50);
    bt.addActionListener(new liga());
    jp = new JProgressBar();
    jf.add(jp);
    jp.setBounds(440,40, 230, 50);
    jp.setMinimum(0);
    jp.setMaximum(100);
    jp.setStringPainted(true);
    jf.setVisible(true);

    }
public class liga implements ActionListener {

    @Override
    public void actionPerformed(ActionEvent arg0) {
        System.out.println("OI");
                    ThreadProgresso p = new ThreadProgresso();
                    p.setProgress(jp);
                    Thread t = new Thread(p);
                    t.start();
               }
}



public static void main(String args[]){
    Barra br = new Barra();
    br.Barra();
}


}


class ThreadProgresso implements Runnable{

    private JProgressBar j;

    public void setProgress(JProgressBar j) {
        this.j = j;
    }

    public void run() {
                   try{
                    j.setValue(10);   // pinta a JProgress em 10%
                    Thread.sleep( 500 );
                    j.setValue(20);   // pinta a JProgress em 20%
                    Thread.sleep( 500 );
                    j.setValue(30);   // pinta a JProgress em 30%

                   } catch ( InterruptedException e){
                           System.out.println("Houve um erro ao pausar a thread");
                   }
}
}