This is a program that goes full screen for five seconds then go back to normal. What i am trying to do is change the back ground color to yellow. I tried getContentPane().setBackground(Color.YELLOW) but it still does not work.
package gamedev;
import java.awt.Color;
import java.awt.DisplayMode;
import java.awt.Font;
import java.awt.Graphics;
import java.io.PrintWriter;
import javax.swing.JFrame;
public class GameDev extends JFrame {
public static void main(String[] arg) {
DisplayMode dm = new DisplayMode(800, 600, 16, DisplayMode.REFRESH_RATE_UNKNOWN);
GameDev b = new GameDev();
b.getContentPane().setBackground(Color.yellow);
b.run(dm);
}
public void run(DisplayMode dm) {
setBackground(Color.YELLOW);
setForeground(Color.red);
setFont(new Font("Arial", Font.PLAIN, 25));
Screen s = new Screen();
try {
s.setFullScreen(dm, this);
try {
Thread.sleep(5000);
} catch (Exception ex) {
}
} finally {
s.restoreScreen();
}
}
public void paint(Graphics g) {
g.drawString("You know you love me home boy.", 200, 200);
}
}
and second class
package gamedev;
import java.awt.DisplayMode;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Window;
import javax.swing.JFrame;
public class Screen {
GraphicsDevice videoCard;
public Screen() {
GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
videoCard = env.getDefaultScreenDevice(); // acces computer screen
}
public void setFullScreen(DisplayMode dm, JFrame window) {
window.setUndecorated(true);
window.setResizable(false);
videoCard.setFullScreenWindow(window);
if (dm != null && videoCard.isDisplayChangeSupported()) {
try {
videoCard.setDisplayMode(dm);
} catch (Exception ex) {
}
}
}
public Window getFullScreenWindow() {
return videoCard.getFullScreenWindow(); //returns ur window
}
public void restoreScreen() {
Window w = videoCard.getFullScreenWindow();
if (w != null) {
w.dispose();
}
videoCard.setFullScreenWindow(null); // takes away from full screen.
}
}
Basically, you are blocking the Event Dispatching Thread, preventing from processing any new incoming events, including paint requests. Instead, you should use something like a javax.swing.Timer to wait in the background until the required time has elapsed, then restore the screen.
The javax.swing.Timer will provide notification after the specified delay within the context of the Event Dispatching Thread, making it safe to use when you need to make modifications to the UI.
Take a closer look at Concurrency in Swing for more details...
import java.awt.Color;
import java.awt.DisplayMode;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.Timer;
public class GameDev extends JFrame {
public static void main(String[] arg) {
DisplayMode dm = new DisplayMode(800, 600, 16, DisplayMode.REFRESH_RATE_UNKNOWN);
GameDev b = new GameDev();
b.getContentPane().setBackground(Color.yellow);
b.run(dm);
}
public void run(DisplayMode dm) {
setBackground(Color.YELLOW);
setForeground(Color.red);
setFont(new Font("Arial", Font.PLAIN, 25));
final Screen s = new Screen();
s.setFullScreen(dm, this);
Timer timer = new Timer(5000, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
s.restoreScreen();
}
});
timer.setRepeats(false);
timer.start();
}
public void paint(Graphics g) {
super.paint(g);
g.drawString("You know you love me home boy.", 200, 200);
}
public class Screen {
GraphicsDevice videoCard;
public Screen() {
GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
videoCard = env.getDefaultScreenDevice(); // acces computer screen
}
public void setFullScreen(DisplayMode dm, JFrame window) {
window.setUndecorated(true);
window.setResizable(false);
videoCard.setFullScreenWindow(window);
if (dm != null && videoCard.isDisplayChangeSupported()) {
try {
videoCard.setDisplayMode(dm);
} catch (Exception ex) {
}
}
}
public Window getFullScreenWindow() {
return videoCard.getFullScreenWindow(); //returns ur window
}
public void restoreScreen() {
Window w = videoCard.getFullScreenWindow();
if (w != null) {
w.dispose();
}
videoCard.setFullScreenWindow(null); // takes away from full screen.
}
}
}
You should also take a look at Performing Custom Painting, as your paint method may be preventing it from actually painting the background
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