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    <p>The whole point of threads is that things are not executed in sequence. doInBackground() can finish (a while loop iteration) before process() is called. doInBackground() runs on the swing worker thread process() runs on the EDT.</p> <p>process() will run before done() (because it also runs on the EDT).</p> <p>As noted by the other answer: you should only publish the text, then create the JButton in process().</p> <p>Note normally you start a SwingWorker from the EDT, in that case you should not call get() on the EDT (which would block it).</p> <p>Simple example:</p> <pre><code>import java.awt.*; import java.awt.event.ActionEvent; import java.util.*; import javax.swing.*; public class SwingWorkerTest { public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { final JPanel panel = new JPanel(new GridLayout(0, 1)); new SwingWorker&lt;Void, String&gt;() { @Override protected Void doInBackground() throws Exception { Random random = new Random(); int count = 1; while (count &lt; 100) { publish("Button " + (count++)); Thread.sleep(random.nextInt(1000) + 500); } return null; } @Override protected void process(List&lt;String&gt; chunks) { for (String text : chunks) { panel.add(new JButton(new AbstractAction(text) { @Override public void actionPerformed(ActionEvent e) { panel.remove((JButton) e.getSource()); panel.revalidate(); panel.repaint(); } })); } panel.revalidate(); panel.repaint(); } }.execute(); JFrame frame = new JFrame("Test"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().add(new JScrollPane(panel)); frame.setPreferredSize(new Dimension(400, 300)); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } } </code></pre>
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    1. USWalter Laan
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    1. CO"Note normally you start a SwingWorker from the EDT, in that case you should not call get() on the EDT (which would block it)." <---- This was my issue. Removed all of my statements, left only the sysouts, the problem still persisted. I was using `get()` to block the the thread in which I called `worker.execute` from finishing(since worker.execute() returns immediately). I needed this because my main program body has a .join(), which waits for thread with the swing worker to finish.
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    2. COIf that thread terminated immediatelly, so did the execution of myprogram, even though the swing worker was still running in the background. With the example you wrote, now I know how to get by this issue. thank you!
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