background color is not changing?

[Punit Jain]

hello i m having some problem in the below code, my background color is not going to change to green, can anyone tell me why?
and also how can i set an image as my background here?

package game;
import java.awt.*;
import javax.swing.JFrame;
public class gameMain extends JFrame {
public static void main(String[] arg) {
DisplayMode dm = new DisplayMode(800,600,16, DisplayMode.REFRESH_RATE_UNKNOWN);
gameMain b = new gameMain();
b.run(dm);
}
public void run(DisplayMode dm) {
setBackground(Color.GREEN);
setForeground(Color.BLUE);
setFont(new Font("Arial", Font.PLAIN, 24));
screen s = new screen();
try{
s.setFullScreen(dm, this);
try{
Thread.sleep(5000);
}catch(Exception ex){}
}finally{
s.restoreScreen();
}
}
public void paint(Graphics g){
if(g instanceof Graphics2D){
Graphics2D g2 = (Graphics2D)g;
g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
}
g.drawString("Hello it's me punit.", 200, 200);
}
}

[VK: Added code tags]

[Rob Camick]

After over 70 postings on the forum you should know how to use the "code formatting tags" so the code you post is formatted and readable.

You need to change the background of the content pane, not the JFrame.

Read the section from the Swing tutorial on Custom Painting for the proper way to do this. You should NOT override the paint() method.

[Punit Jain]

sorry, i forgot to add code tags..
and thanks...

[Punit Jain]

As you said, i replaced my run method like:

public void run(DisplayMode dm) {
Panel topPanel = new Panel();
topPanel.setLayout( new BorderLayout() );
getContentPane().add( topPanel );
topPanel.setBackground(Color.GREEN);
topPanel.setForeground(Color.BLUE);
setFont(new Font("Arial", Font.PLAIN, 24));
screen s = new screen();
try{
s.setFullScreen(dm, this);
try{
Thread.sleep(5000);
}catch(Exception ex){}
}finally{
s.restoreScreen();
}

now i m able to get my background color, but now my text

g.drawString("Hello it's me punit.", 200, 200);

is not visible.

[Rob Camick]

1) Still didn't paste the code properly. I'm sure you don't write code left justified, so don't expect use to read it like that.

2) Can't tell what you are doing because you didn't post a proper SSCCE.

[Rob Spoor]

No no no no no. That was my first reaction when I saw your code. You are blocking the Event Dispatcher Thread with your sleep call, and that causes the entire user interface to block. Please read Concurrency in Swing.