Can you get this SwingWorker code to work more than once

Thu, 9 Aug 2012 08:24:28 -0700 (PDT)
Here is a project that works perfectly only the first time. This is what it does on the first button press:

It starts-up with only a "Start" button.

(1) Pressing start displays "Hello World".
(2) The three "for" loops are executed in the code.
(3) "Hello World" disappears.

But, when you press the "Start" button a second time this happens:

(1) Displays "Hello World",

How do you modify the below code so that the second button press matches the first button press.

The code has a button and a label.

After answering the above question, another question that I have is: can you make this code better in any way imaginable.

Thank you,

package Test_SwingWorker;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.List;
import javax.swing.SwingWorker;

public class Test_SwingWorker extends javax.swing.JFrame
    public Test_SwingWorker()

        //The "Hello World" label that is not seen on Start-up
        jLabel1.setVisible (false);
        final Non_GUI_Stuff task = new Non_GUI_Stuff();
        jButton1.addActionListener(new ActionListener()
            public void actionPerformed(ActionEvent e)
                //The "Hello World" label that appears when button is pressed
                jLabel1.setVisible (true);
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jButton1 = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();



        jLabel1.setText("Hello World");

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
                .addGap(167, 167, 167)
                .addGap(51, 51, 51)
                .addContainerGap(55, Short.MAX_VALUE))
                .addContainerGap(283, Short.MAX_VALUE))

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
            .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)


    public static void main(String args[])
        java.awt.EventQueue.invokeLater(new Runnable()
            public void run()
                new Test_SwingWorker().setVisible(true);
class Non_GUI_Stuff extends SwingWorker<Integer, Integer>
  protected Integer doInBackground() throws Exception
      //"for" loops mentioned above
      for (int i = 0;i < 100000; i++)
          for (int i2 = 0;i2 < 100000; i2++);
      for (int i3 = 0;i3 < 100000; i3++);
    return 0;
  protected void done()
      //The "Hello World" label that disappears
      jLabel1.setVisible (false);
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JPanel jPanel1;

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