Full screen mode, packages and the like

Question

I am trying to keep my code neat byt putting various related functions into clases with their associated methods. All is working sort of okay until I want to carry out a drawimage to the graphics device g . g is in one class and the drawimage method is in another. How do I pass the graphics device to the image class and assocaited method?? Help
I am using netbeans and each class is in the same package. Any help on this is appreciated.
* Main.java
* Created on 10 August 2005, 09:19
* To change this template, choose Tools | Options and locate the template under
* the Source Creation and Management node. Right-click the template and choose
* Open. You can then make changes to the template in the Source Editor.
package dna;
import java.awt.*;
import javax.swing.*;
* @author damian creedon
public class PerfectDNA extends JFrame {
/** Creates a new instance of Main */
public PerfectDNA() {
* @param args the command line arguments
public static void main(String[] args) {
DisplayMode displayMode;
displayMode = new DisplayMode(1024, 768, 32, DisplayMode.REFRESH_RATE_UNKNOWN);
PerfectDNA eden = new PerfectDNA();
eden.run(displayMode);
private static final long DEMO_TIME = 10000;
public void run(DisplayMode displayMode){
setBackground(Color.blue);
setForeground(Color.white);
setFont(new Font("Dialog", 0, 24));
ScreenManager screen = new ScreenManager();
try {
screen.setFullScreen(displayMode, this);
try {
Thread.sleep(DEMO_TIME);
catch (InterruptedException ex) { }
finally {
screen.restoreScreen();
ImageManager images = new ImageManager();
images.loadImages();
images.drawImages();
public void init(){
public void paint(Graphics g) {
public void repaint(Graphics g){
* ScreenManager.java
* Created on 10 August 2005, 10:52
* To change this template, choose Tools | Options and locate the template under
* the Source Creation and Management node. Right-click the template and choose
* Open. You can then make changes to the template in the Source Editor.
package dna;
import java.awt.*;
import javax.swing.*;
* @author damian creedon
public class ScreenManager {
public GraphicsDevice device;
/** Creates a new instance of ScreenManager */
public ScreenManager() {
GraphicsEnvironment environment = GraphicsEnvironment.getLocalGraphicsEnvironment();
device = environment.getDefaultScreenDevice();
public void setFullScreen(DisplayMode displayMode,JFrame window){
window.setUndecorated(true);
window.setResizable(false);
device.setFullScreenWindow(window);
if (displayMode != null &&
device.isDisplayChangeSupported())
try {
device.setDisplayMode(displayMode);
catch (IllegalArgumentException ex) {
// ignore - illegal mode for this device
public Window getFullScreenWindow() {
return device.getFullScreenWindow();
public void restoreScreen() {
Window window = device.getFullScreenWindow();
if (window != null) {
window.dispose();
device.setFullScreenWindow(null);
* ImageManager.java
* Created on 10 August 2005, 13:49
* To change this template, choose Tools | Options and locate the template under
* the Source Creation and Management node. Right-click the template and choose
* Open. You can then make changes to the template in the Source Editor.
package dna;
import java.awt.*;
import javax.swing.*;
* @author damian creedon
public class ImageManager {
private Image bgImage;
private Image opaqueImage;
private boolean imagesLoaded;
/** Creates a new instance of ImageManager */
public ImageManager() {
public void loadImages() {
bgImage = loadImage("images/background.jpg");
opaqueImage = loadImage("images/opaque.png");
imagesLoaded = true;
private Image loadImage(String fileName) {
return new ImageIcon(fileName).getImage();
public void drawImages() {
g.drawImage(bgImage, 0, 0);
}

Answer 1

Hiya,
I tried this
public void paint(Graphics g) {
drawImages(g);
and get this error
Compiling 2 source files to C:\My Projects\java\My Projects\dna\build\classes
C:\My Projects\java\My Projects\dna\src\dna\PerfectDNA.java:66: drawImages(java.awt.Graphics) in dna.ImageManager cannot be applied to ()
images.drawImages();
C:\My Projects\java\My Projects\dna\src\dna\PerfectDNA.java:77: cannot find symbol
symbol : method drawImages(java.awt.Graphics)
location: class dna.PerfectDNA
drawImages(g);
2 errors
BUILD FAILED (total time: 2 seconds)
The method called is
public void drawImages(Graphics g) {
g.drawImage(bgImage, 0, 0,null);
Further help would be appreciated.