Swing window doesn't appear after getting input from Console

Question

I have a simple swing window in order to load files.

This appear in the class analyzedLoad, in a function analyzedloads()

JFileChooser fc = new JFileChooser();
JFrame frame = new JFrame();
int returnVal = fc.showOpenDialog(frame);
frame.dispose();
if (returnVal == JFileChooser.APPROVE_OPTION) {

Where I apply the function without get an input from the user, all fine. But where I get an input from the user, in this way:

    int al= 0;
     Scanner in = new Scanner(System.in);
       System.out.println("for choose file, press 1; for save, press 2");
       al= in.nextInt();
       if (al== 1){
        analyzedLoad.analyzedloads(); // A static function which open the swing window

The window doesn't appear, and the process continue to run, without doing anything.

Thanks.

Answer 1

Becaue "a scanning operation may block waiting for input," I suspect you're blocking the event dispatch thread. Instead use a File Chooser to obtain a file reference.

Answer 2

Try adding a second mywindow.setVisible(true) after the console operation.

Answer 3

You might want to try to declaring the analyzeLoad variable as final and do something like so:

SwingUtilities.invokeLater(new Runnable()
{
    @Override
    public void run()
    {
         analyzedLoad.analyzedloads();
    }
}

or since the method is static:

    SwingUtilities.invokeLater(new Runnable()
    {
        @Override
        public void run()
        {
             YourClass.analyzedloads();
        }
    }

That being said, without more code we can only speculate.