[Debutant] Animation sprite
Bonjour ,
Mon programme est simple , c'est une interface graphique avec un sprite qui marche.
J'ai une erreur que je n'arrive pas a identifier dans mon programme, a chaque fois il me balance à l'excution :
Citation:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at robotGraphique.graphicalRenderer(robotGraphique.java:104)
at robotGraphique$1.windowOpened(robotGraphique.java:55)
at java.awt.Window.processWindowEvent(Window.java:1187)
at javax.swing.JFrame.processWindowEvent(JFrame.java:266)
at java.awt.Window.processEvent(Window.java:1148)
at java.awt.Component.dispatchEventImpl(Component.java:3955)
at java.awt.Container.dispatchEventImpl(Container.java:2024)
at java.awt.Window.dispatchEventImpl(Window.java:1774)
at java.awt.Component.dispatchEvent(Component.java:3803)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
Code:
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import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import javax.swing.*;
public class robotGraphique implements KeyListener{
//nom des fichiers sprites a charger
private static final String strImgMove = "024.png";
private static final String strImgDie = "dead.png";
//Index des images de deplacement du robot
private static final int IMG_DOWN = 0;
private static final int IMG_LEFT = 1;
private static final int IMG_RIGHT = 2;
private static final int IMG_UP = 3;
//coordonées maximum du robot
private final static int MAX_HEIGHT=520;
private final static int MIN_HEIGHT=200;
private final static int MAX_WIDTH=740;
private final static int MIN_WIDTH=0;
//coordonnée du robot
private int x=MAX_WIDTH/2;
private int y=MAX_HEIGHT/2;
private BufferStrategy strategy;
private Graphics buffer;
private Image[][] imgTab;
private Image img;
private Image imgDie;
private JFrame fenetre;
private MediaTracker MT;
public robotGraphique(){
imgTab = new Image[4][4];
//On creer une nouvelle fenetre
fenetre = new JFrame("Controle robot");
//On lui definit un fond d'ecran gris
fenetre.setBackground(Color.GRAY);
//On récupére la taille de l'ecran
Dimension dimEcran = Toolkit.getDefaultToolkit().getScreenSize();
fenetre.setSize(800,600);
//On definit la place de la fenetre sur l'ecran
fenetre.setLocation((dimEcran.width-800)/2,(dimEcran.height-600)/2);
//On la rend visible
fenetre.setVisible(true);
//On ajoute le KeyListener et WindowListener
fenetre.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent evt){fenetre.dispose();}
public void windowActivated(WindowEvent evt){graphicalRenderer();}
public void windowOpened(WindowEvent e){graphicalRenderer();}
public void windowClosed(WindowEvent evt){System.exit(0);}}
);
fenetre.addKeyListener(this);
//On gére nous meme l'affichage
fenetre.setIgnoreRepaint(true);
//Mise en place du buffering
fenetre.createBufferStrategy(2);
strategy = fenetre.getBufferStrategy();
//On charge les images dans le buffer
imageLoad();
//On verifie que les images soient chargées
if(MT.checkAll()==false)
System.exit(-48000);
graphicalRenderer();
}
public static void main(String args[]){
new robotGraphique();
}
private void imageLoad(){
int index=0;
CropImageFilter c;
MT =new MediaTracker(fenetre);
//On charge notre image
img = Toolkit.getDefaultToolkit().getImage(strImgMove);
for(int ligne=0;ligne<4;ligne++){
for(int col=0;col<4;col++){
c = new CropImageFilter(32*col,48*ligne,32,48);
imgTab[ligne][col] =fenetre.createImage(
new FilteredImageSource(img.getSource(), c));
//ajoute l'image au media tracker [index est une reference sur l'image dans MT]
MT.addImage(imgTab[ligne][col],index);
}
}
img = Toolkit.getDefaultToolkit().getImage(strImgDie);
c = new CropImageFilter(0,0,32,48);
img = imgDie = fenetre.createImage(
new FilteredImageSource(img.getSource(), c));
MT.addImage(imgDie,index);
try {
MT.waitForAll();
} catch (InterruptedException e) {
System.out.println("MT.waitForAll() "+e);
}
}
public void graphicalRenderer(){
buffer = strategy.getDrawGraphics();
buffer.setColor(Color.LIGHT_GRAY);
buffer.fillRect(0,0,800,600);
buffer.drawImage(img,x,y,null);
strategy.show();
}
public void keyPressed(KeyEvent key){
}
public void keyReleased(KeyEvent key){
deplace(key.getKeyCode());
}
public void keyTyped(KeyEvent key){}
public void deplace(int keyValue){
int i=0;
switch(keyValue){
case 37:{
do{
i++; if(i==4) i=0;
try{
img = imgTab[IMG_LEFT][i];
x-=2;
if(x<MIN_WIDTH)
x=MIN_WIDTH;
Thread.sleep(125);
graphicalRenderer();
}catch(Exception e){
System.out.println("MOVE LEFT : "+e);
}
}while(i!=0);
break;
}
case 38:{
do{
i++; if(i==4) i=0;
try{
img = imgTab[IMG_UP][i];
y-=2;
if(y<MIN_HEIGHT)
y=MIN_HEIGHT;
Thread.sleep(125);
graphicalRenderer();
}catch(Exception e){
System.out.println("MOVE UP : "+e);
}
}while(i!=0);
break;
}
case 39:{
do{
i++; if(i==4) i=0;
try{
img = imgTab[IMG_RIGHT][i];
x+=2;
if(x>MAX_WIDTH)
x=MAX_WIDTH;
Thread.sleep(125);
graphicalRenderer();
}catch(Exception e){
System.out.println("MOVE RIGHT : "+e);
}
}while(i!=0);
break;
}
case 40:{
do{
i++; if(i==4) i=0;
try{
img = imgTab[IMG_DOWN][i];
y+=2;
if(y>MAX_HEIGHT)
y=MAX_HEIGHT;
Thread.sleep(125);
graphicalRenderer();
}catch(Exception e){
System.out.println("MOVE DOWN : "+e);
}
}while(i!=0);
break;
}
case 35:{
img = imgDie;
graphicalRenderer();
}
}
}
} |
