Problem with refreshing

[misiom1]

Hello
I have a textarea:

		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:

			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

[doWhile]

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

[misiom1]

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

[Fubarable]

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

[misiom1]

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

[doWhile]

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)

[misiom1]

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

And here's code responsible for this change:

	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();
		}
		
		
	};

[misiom1]

answer is to add validate(); after adding splitPane