SwingWorker in Java (beginner question)
- by Malachi
I am relatively new to multi-threading and want to execute a background task using a Swingworker thread - the method that is called does not actually return anything but I would like to be notified when it has completed.
The code I have so far doesn't appear to be working:
private void crawl(ActionEvent evt)
{
try
{
SwingWorker<Void, Void> crawler = new SwingWorker<Void, Void>()
{
@Override
protected Void doInBackground() throws Exception
{
Discoverer discover = new Discoverer();
discover.crawl();
return null;
}
@Override
protected void done()
{
JOptionPane.showMessageDialog(jfThis, "Finished Crawling", "Success", JOptionPane.INFORMATION_MESSAGE);
}
};
crawler.execute();
}
catch (Exception ex)
{
JOptionPane.showMessageDialog(this, ex.getMessage(), "Exception", JOptionPane.ERROR_MESSAGE);
}
}
Any feedback/advice would be greatly appreciated as multi-threading is a big area of programming that I am weak in.
