Problem with refreshing

Hello
I have a textarea:

Code:

---

                textarea = new JTextArea();
                textarea.setFont(new Font("Courier", Font.PLAIN,  22));
                scrollPane = new JScrollPane(textarea);
                scrollPane.setPreferredSize(new Dimension(300,300));
                add(scrollPane, BorderLayout.CENTER);

---

And when some button is clicked I want to create second textarea:

Code:

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                        remove(scrollPane);
                        JTextArea textarea1 = new JTextArea();
                        textarea1.setPreferredSize(new Dimension(100,100));
                        JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT, scrollPane, textarea1);
                        splitPane.setOneTouchExpandable(true);
                        add(splitPane);

---

Everything works fine but when I click the button, window is one can say "frozen", if you press any menu and close is, grey color still stays on textarea place, but when i resize window it goes back to what it was suppoused to be and I have 2 textareas. How to fix it?

Thanks for responds.

Regards

When dynamically adding components to a container (after it has been validated), call revalidate() on the component.

Eh, I feel so dumb in java.
I tried to do splitPane.revalidate(); but it didn't gave effect I expected.

This is my whole code Ideone.com | Online Java Compiler & Debugging Tool

Could you tell me where to put revalidate?

I've just started programming in java, I'm though good at C and crossing over to new language is quite hard for me.

Thanks

If removing a component, don't forget to also call repaint() on the container.

I did remove then repaint, then when I added a new component I put revalidate on new added component and I get a grey background, tried after adding a component ravalidate and repaint - effect is the same

Post an SSCCE that demonstrates the problem (and recommended to place the code in the post itself - flanking the code with the [code][/code] tags)

Here is program - http://www.misiom1.pl/test.jar Just pick menu "Kod" and press "kompiluj"

And here's code responsible for this change:

Code:

---

        Action compileAction = new AbstractAction("Kompiluj")
        {

                @Override
                public void actionPerformed(ActionEvent arg0) {
                        remove(scrollPane);
                        repaint();
                        JTextArea textarea1 = new JTextArea();
                        //add(textarea1, BorderLayout.SOUTH);
                        //scrollPane.setPreferredSize(new Dimension(300,300));
                        textarea1.setPreferredSize(new Dimension(100,100));
                        JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT, scrollPane, textarea1);
                        splitPane.setOneTouchExpandable(true);
                        add(splitPane);
                        splitPane.revalidate();
                }
               
               
        };

---

answer is to add validate(); after adding splitPane