Using Swingworker to constantly update a GUI

Question

In my code, the user presses a button, and then I want this to invoke a SwingWorker background thread, where I basically loop through a list, cross reference it with other data, and then update the GUI with a JLabel for every pass through my loop. The problem is I know I should do this in doInBackground(), but I have nothing to return, and I also want to update the JPanel with a new JLabel every time my loop loops. How do I do this? Thanks!

Answer 1

Here is a complete example i really like Swing Worker Example

You have to use publish() and override process()

Example:

class Worker extends SwingWorker<Void, String> {

    @Override
    protected void doInBackground() throws Exception {
       //here you make heavy task this is running in another thread not in EDT
       //process after some time call publish() 


    }

    @Override
    protected void process(List<String> chunks) {
        //this is executed in the EDT
        //here you update your label
    }
}