staram się więc stworzyć prosty program, w którym klikniesz na ekran i utworzy on blokadę, która spada i zderza się z większym blokiem poniżej i przylega do niego. Jakby prosty program kolizyjny. Problem polega na tym, że kiedy tworzę jeden blok, usuwa on poprzednio blok. Zrobiłem tablicę, ale nadal to robi. Czy ktoś z was wie, co robię źle? Jestem pewien, że to prosta naprawa.

    public class Screen extends JPanel implements Runnable {

public static JLabel statusbar; //displays a status bar showing what mouse movements are taking place
private Image cat;  //image of the cat
public int xCoord ; //get the coordinates of the mouse pressed
public int yCoord ;
public int xCreate;
public int yCreate;
public Rectangle Ground;
public Rectangle Block;
public boolean isClicked = false;
public int clickCount = 0;
Rectangle blocks[] = new Rectangle[10];

int blocknum = 0;

    public Screen(Frame frame) {
            loadPic(); //calls the loadPic method above 
                Handlerclass handler = new Handlerclass(); //creates a new class to use the mouse motion listener
                    System.out.println("mouse works!");
         addMouseListener(handler);
         addMouseMotionListener(handler);
         statusbar = new JLabel("default");
            add(statusbar);
    }
    public void run(){ //this is the game run loop
        System.out.println("this is running");   
        try{
        } catch(Exception e) {} //exception handling

    }
    public void loadPic(){ //loads the picture from the other project but its the same pic
        cat = new ImageIcon("C:\\Users\\Camtronius\\Documents\\NetBeansProjects\\Moving Block Proj\\src\\MovingBlock\\catIcon1.png").getImage(); //gets the image
        System.out.println("Image Loaded!");
    }

     @Override public void paintComponent(Graphics g){
        super.paintComponent(g); //paints the component, the picture, on top
            Graphics2D g2d = (Graphics2D) g.create();

             g2d.drawImage(cat, xCoord, yCoord, null);      

             g2d.setColor(Color.BLUE);
             Ground = new Rectangle(0,450,550,50);
             g2d.fillRect(0,450, 550, 50);

                 for(Rectangle blocknum : blocks){
                  if (blocks != null) {    
                      g2d.setColor(Color.RED);
                       g2d.fillRect(xCreate,yCreate,50,50); 
                       System.out.println(blocknum);
                  }

                 }
                 //move();           
    }

   public void move(){   
    if(yCreate<400){
        yCreate+=1;
    }else{
        }
    if(Ground.intersects(blocks[blocknum])){ 
            yCreate=400;
            System.out.println("contains!");
        }
    }    
     private class Handlerclass implements MouseListener, MouseMotionListener{
        public void mouseClicked(MouseEvent event){

        }
        public void mousePressed(MouseEvent event){

        }
        public void mouseReleased(MouseEvent event){

         if(blocknum<blocks.length){
            xCreate=event.getX();
            yCreate=event.getY(); 
            blocks[blocknum] = new Rectangle(50,50, xCreate, yCreate);
            repaint();
         }
        blocknum=blocknum+1;
        }
        public void mouseEntered(MouseEvent event){

        }
        public void mouseExited(MouseEvent event){

        } 
        public void mouseDragged(MouseEvent event){

        }
        public void mouseMoved(MouseEvent event){
           statusbar.setText(String.format("Coordinates are: %d, %d", event.getX(),event.getY()));
            xCoord=event.getX();
            yCoord=event.getY(); 
        }
    }
}