Background Color change JFrame

Question

I have to change the background color when the result is either too high or low. Program runs great except the background color doesn't change. And before you complain about my code, I hit the "CODE" button before and after my code in here and it does nothing. The videos wouldn't play. So I don't know how to add code correctly.
import java.awt.*;
import java.util.Random;
import javax.swing.*;
public class NumberGuess extends JFrame {
Random rand = new Random ( ) ;
int randomNumber = 1 + rand.nextInt(1000);
int count = 0;
private JFrame panel = new JFrame();
private JFrame panelButtons = new JFrame();
private JFrame panelBottom = new JFrame();
private void compareResult() {
int userInput = Integer.parseInt(tempTextField.getText().trim());
if ( userInput > randomNumber )
resultLabel.setText( "Too High. Try a lower number." );
setBackgroundColor(Color.blue);
private void setBackgroundColor(Color color)
panel.setBackground(color);
panelBottom.setBackground(color);
panelButtons.setBackground(color);

Answer 1

Goofy_1969 wrote:
And before you complain about my code, I hit the "CODE" button before and after my code in here and it does nothing.Well, you did manage to create 2 empty code blocks though.
I know this is New To Java, so I need to be nicer and most of you people don't probably have the intrinsic knowledge of "start tag" and "end tag".
But still. All you need is to put your code between tags and everything will work great.
AND HEY, There's the preview button too! So you can actually try and try and try until it works. It's just that programming is a difficult hobby and if you can't work the code tags, you really need to rethink whether you're ready for something that's actually complicated.
(Also if you're not using the code tags, your code will totally get screwed up and people can't help you even if they wanted to.)
As for your code, try using SwingUtilities.invokeLater(). That's the only way you can modify the GUI when you're not running in the event thread.