JavaFX应用程序：读取文件时在栏中显示进度

Question

I have a csv file reader, which calls a method that should update the progress bar. However the progress bar doesn't update, even when I try to schedule it with Platform.runLater. The file reading is part of a synchronous processing so I can't just run the reader in its own thread - I have to wait for the thread to join. The progressbar is working in some other context. What I tried:

public CsvFile(File file, SEPARATOR separator)
{
    this.file = file;
    this.separator = separator.value();
    setPattern();

    Thread thread = new Thread() {
        public void run() {
            readFile();
        };
    };
    thread.start();
    try
    {
        Thread.sleep(5000);//HACK
        thread.join();//HACK
    }
    catch (InterruptedException e)
    {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

And the progress bar method, which is called by readFile():

public void setProgressExecute(double progress)

{
    //ProgressExecute.setProgress(progress);
    Platform.runLater(new Runnable() {
        @Override
        public void run() {
            ProgressExecute.setProgress(progress);
        }
    });
}

Update

I am now calling new CsvFile in it own thread. This makes the progressbar work. However, it also forces me to use Platform.runLater to run GUI updates, since only the JavaFX thread may update certain parts of the GUI. My new problem is with Platform.runLater: it runs stuff in LIFO order which reverses the order of processing. Well I guess you can't have it all.

Answer 1

you can create a service class(LogFilesService extends Service) and bind the progressProperty. At the Service class you can use the updateProgress to update the progress.