Hey there
I am following a tutorial.
From what I can see, I have exactly the same code as the tutorial does, but when I execute my code, I just get a blank screen.
It is supposed to be an animation.
Images are in the same folder as the source code.
Can you tell me where I am going wrong (I am a complete beginner)
Here is the code:
Bucky class, contains main method
Screen Manager classCode:import java.awt.*;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import java.awt.Frame.*;
import java.lang.*;
import java.io.*;
import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.image.BufferStrategy;
import java.awt.image.BufferedImage;
import java.lang.reflect.InvocationTargetException;
import javax.swing.JFrame;
public class bucky {
public static void main(String[] args) {
bucky b = new bucky();
b.run();
}
private Animation a;
private ScreenManager s;
private Image bg;
private static final DisplayMode modes1[] = {
new DisplayMode(800, 600, 32, 0),
new DisplayMode(800, 600, 24, 0),
new DisplayMode(800, 600, 16, 0),
new DisplayMode(640, 480, 32, 0),
new DisplayMode(640, 480, 24, 0),
new DisplayMode(640, 480, 16, 0),};
public void LoadImages() {
bg = new ImageIcon("back.PNG").getImage();
Image face1 = new ImageIcon("//face_up.PNG").getImage();
Image face2 = new ImageIcon("//face_down.PNG").getImage();
a = new Animation();
a.addScene(face1, 250);
a.addScene(face2, 250);
}
//main method called from main
public void run() {
s = new ScreenManager();
try {
DisplayMode dm = s.findFirstCompatibleMode(modes1);
s.setFullScreen(dm);
LoadImages();
movieLoop();
} finally {
s.restoreScreen();
}
}
//play movie
public void movieLoop() {
long startingTime = System.currentTimeMillis();
long cumTime = startingTime;
while (cumTime - startingTime < 5000) {
long timePassed = System.currentTimeMillis() - cumTime;
cumTime += timePassed;
a.update(timePassed);
//draw and update screen
Graphics2D g = s.getGraphics();
draw(g);
g.dispose();
s.update();
try {
Thread.sleep(20);
} catch (Exception ex) {
}
}
}
public void draw(Graphics g) {
g.drawImage(bg, 0, 0, null);
g.drawImage(a.getImage(), 0, 0, null);
}
}
Animation classCode:import java.awt.*;
import java.awt.image.BufferStrategy;
import java.awt.image.BufferedImage;
import java.lang.reflect.InvocationTargetException;
import javax.swing.JFrame;
public class ScreenManager {
private GraphicsDevice vc;
//give vc access to monitor
public ScreenManager() {
GraphicsEnvironment e = GraphicsEnvironment.getLocalGraphicsEnvironment();
vc = e.getDefaultScreenDevice();
}
public DisplayMode[] getCompatibleDisplayModes() {
return vc.getDisplayModes();
}
//compares dm passed in...
public DisplayMode findFirstCompatibleMode(DisplayMode modes[]) {
DisplayMode goodModes[] = vc.getDisplayModes();
for (int x = 0; x < modes.length; x++) {
for (int y = 0; y < goodModes.length; y++) {
if (displayModesMatch(modes[x], goodModes[y])) {
return modes[x];
}
}
}
return null;
}
//get current dm
public DisplayMode getCurrentDisplayMode() {
return vc.getDisplayMode();
}
//chechs if two modes match eachother
public boolean displayModesMatch(DisplayMode m1, DisplayMode m2) {
if (m1.getWidth() != m2.getWidth() || m1.getHeight() != m2.getHeight()) {
return false;
}
if (m1.getBitDepth() != DisplayMode.BIT_DEPTH_MULTI && m2.getBitDepth() != DisplayMode.BIT_DEPTH_MULTI && m1.getBitDepth() != m2.getBitDepth()) {
return false;
}
if (m1.getRefreshRate() != DisplayMode.REFRESH_RATE_UNKNOWN && m2.getRefreshRate() != DisplayMode.REFRESH_RATE_UNKNOWN && m1.getRefreshRate() != m2.getRefreshRate()) {
return false;
}
return true;
}
//make frame full screen
public void setFullScreen(DisplayMode dm) {
JFrame f = new JFrame();
f.setUndecorated(true);
f.setIgnoreRepaint(true);
f.setResizable(false);
vc.setFullScreenWindow(f);
if (dm != null && vc.isDisplayChangeSupported()) {
try {
vc.setDisplayMode(dm);
} catch (Exception ex) {
}
}
f.createBufferStrategy(2);
}
//we will set Graphics object = to this
public Graphics2D getGraphics() {
Window w = vc.getFullScreenWindow();
if (w != null) {
BufferStrategy s = w.getBufferStrategy();
return (Graphics2D) s.getDrawGraphics();
} else {
return null;
}
}
//updates display
public void update() {
Window w = vc.getFullScreenWindow();
if (w != null) {
BufferStrategy s = w.getBufferStrategy();
if (!s.contentsLost()) {
s.show();
}
}
}
public Window getFullScreenWinodw() {
return vc.getFullScreenWindow();
}
public int getWidth() {
Window w = vc.getFullScreenWindow();
if (w != null) {
return w.getWidth();
} else {
return 0;
}
}
public int getHeight() {
Window w = vc.getFullScreenWindow();
if (w != null) {
return w.getHeight();
} else {
return 0;
}
}
public void restoreScreen(){
Window w = vc.getFullScreenWindow();
if(w != null){
w.dispose();
}
vc.setFullScreenWindow(null);
}
//create image compatible with monitor
public BufferedImage createCompatibleImage(int w, int h, int t){
Window win = vc.getFullScreenWindow();
if(win != null){
GraphicsConfiguration gc = win.getGraphicsConfiguration();
return gc.createCompatibleImage(w, h, t);
}
return null;
}
}
THANKS :DCode:import java.awt.Image;
import java.util.ArrayList;
public class Animation {
private ArrayList scenes;
private int sceneIndex;
private long movieTime;
private long totalTime;
public Animation() {
scenes = new ArrayList();
totalTime = 0;
start();
}
public synchronized void addScene(Image i, long t) {
totalTime += t;
scenes.add(new OneScene(i, totalTime));
}
//start animation form begining
public synchronized void start() {
movieTime = 0;
sceneIndex = 0;
}
//change scenes
public synchronized void update(long timePassed){
if(scenes.size()>1){
movieTime += timePassed;
if(movieTime >= totalTime){
movieTime = 0;
sceneIndex = 0;
}
while(movieTime > getScene(sceneIndex).endTime){
sceneIndex++;
}
}
}
public synchronized Image getImage(){
if(scenes.size()==0){
return null;
}
else{
return getScene(sceneIndex).pic;
}
}
//get scene
private OneScene getScene(int x){
return (OneScene)scenes.get(x);
}
//private inner class
private class OneScene{
Image pic;
long endTime;
public OneScene(Image pic, long endTime){
this.pic = pic;
this.endTime = endTime;
}
}
}
