为什么我的SwingWorker不工作？

Question

My SwingWorker doesn't seem to work. It outputs nothing into the textpanel and nothing into the console. It doesn't even execute the actual cmd command in the ProcessBuilder..

I have no clue why it won't work. Anyone seeing anything wrong in the code?

public class cmdExec extends SwingWorker<Integer, String> {

    private int status;

    private FormPanel formPanel = new FormPanel();
    private FooterBar footerBar = new FooterBar();
    private TextPanel textPanel = new TextPanel();

    public cmdExec() {
        textPanel.appendText((this.getState()).toString());
    }

    @Override
    protected Integer doInBackground() {
        try {

            ProcessBuilder pb = new ProcessBuilder(
                "cmd.exe", "/c", "copy NUL createThis.txt"
            );
            pb.directory(new File(formPanel.workspaceDir.toString()));
            pb.redirectErrorStream(true);
            Process p = pb.start();
            String s;
            BufferedReader stdout = new BufferedReader(new InputStreamReader(p.getInputStream()));

            while((s = stdout.readLine()) != null && !isCancelled()) {
                publish(s);
            }
            if(!isCancelled()) {
                status = p.waitFor();
            }
            p.getInputStream().close();
            p.getOutputStream().close();
            p.getErrorStream().close();
            p.destroy();

        } catch(IOException | InterruptedException ex) {
            ex.printStackTrace(System.err);
        }

        return status;
    }

    @Override
    protected void process(List<String> messages) {
        formPanel.okBtn.setText((this.getState()).toString());
        for(String message : messages) {
            textPanel.appendText(message + "\n");
        }
    }

    @Override
    protected void done() {
        textPanel.appendText((this.getState()).toString() + " " + status);
        formPanel.okBtn.setEnabled(true);
        footerBar.progress.setIndeterminate(false);
        formPanel.disableList(false);
        formPanel.disableWorkspace(false);
    }

}

In my main class I just call a cmdExec.execute(); for it to run, and I checked if it even can call it and it does. I checked it by adding a sysout to all the methods in my swingworker, and it did print them on the methods it's supposed to run.

Have I forgot something? I'm just getting blind by looking all over it again to try to see what I've missed.

Here's the code calling the SwingWorker class:

cmdExec cmdExec = new cmdExec();
cmdExec.execute();

This code is in a ActionListener on when a button is pressed.

After further research; I noticed that it's because of these 3 lines:

private FormPanel formPanel = new FormPanel();
private FooterBar footerBar = new FooterBar();
private TextPanel textPanel = new TextPanel();

But I really need to reach variables inside those classes. How can I do this and have it all working?

Answer 1

New Constructor

public cmdExec(FormPanel formPanel,FooterBar footerBar,TextPanel textPanel ) {
            textPanel.appendText((this.getState()).toString());
        }

and in runWorker() you pass the values that you want to be changed.

   cmdExec = new cmdExec(formPanel,footerPanel,textPanel);
   cmdExec.execute();

But as see in your code you need to add an PropertyChangeListeners see more in the documentation how to add a progress bar Documentation of SwinWorker