java上的Pac Man图像代码不可见

我正在用eclipse for java做一个吃豆人游戏。所有的代码都是完整的。。。除了一部分。。。图像。你看，我可以四处走动，收集弹丸和其他东西，但鬼魂和吃豆人是看不见的。这是我的游戏逻辑代码和吃豆人抽象类

  package pacman;
  import java.awt.*;
  import java.awt.event.ActionEvent;
  import java.awt.event.ActionListener;
  import java.awt.event.KeyAdapter;
  import java.awt.event.KeyEvent;
  import javax.swing.ImageIcon;
  import javax.swing.JPanel;
  import javax.swing.Timer;
  public class Model extends JPanel implements ActionListener {

private static final long serialVersionUID = 1L;
private Dimension d;
private final Font smallFont = new Font("Arial", Font.BOLD, 14);
private boolean inGame = false;
private boolean dying = false;

private final int BLOCK_SIZE = 24;
private final int N_BLOCKS = 15;
private final int SCREEN_SIZE = N_BLOCKS * BLOCK_SIZE;
private final int MAX_GHOSTS = 12;
private final int PACMAN_SPEED = 6;

private int N_GHOSTS = 6;
private int lives, score;
private int[] dx, dy;
private int[] ghost_x, ghost_y, ghost_dx, ghost_dy, ghostSpeed;

private Image heart, ghost;
private Image up, down, left, right;

private int pacman_x, pacman_y, pacmand_x, pacmand_y;
private int req_dx, req_dy;

//binary for the stage
private final short levelData[] = {
        
    19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 22,
    17, 16, 16, 16, 16, 24, 16, 16, 16, 16, 16, 16, 16, 16, 20,
    25, 24, 24, 24, 28, 0, 17, 16, 16, 16, 16, 16, 16, 16, 20,
    0,  0,  0,  0,  0,  0, 17, 16, 16, 16, 16, 16, 16, 16, 20,
    19, 18, 18, 18, 18, 18, 16, 16, 16, 16, 24, 24, 24, 24, 20,
    17, 16, 16, 16, 16, 16, 16, 16, 16, 20, 0,  0,  0,   0, 21,
    17, 16, 16, 16, 16, 16, 16, 16, 16, 20, 0,  0,  0,   0, 21,
    17, 16, 16, 16, 24, 16, 16, 16, 16, 20, 0,  0,  0,   0, 21,
    17, 16, 16, 20, 0, 17, 16, 16, 16, 16, 18, 18, 18, 18, 20,
    17, 24, 24, 28, 0, 25, 24, 24, 16, 16, 16, 16, 16, 16, 20,
    21, 0,  0,  0,  0,  0,  0,   0, 17, 16, 16, 16, 16, 16, 20,
    17, 18, 18, 22, 0, 19, 18, 18, 16, 16, 16, 16, 16, 16, 20,
    17, 16, 16, 20, 0, 17, 16, 16, 16, 16, 16, 16, 16, 16, 20,
    17, 16, 16, 20, 0, 17, 16, 16, 16, 16, 16, 16, 16, 16, 20,
    25, 24, 24, 24, 26, 24, 24, 24, 24, 24, 24, 24, 24, 24, 28
    
};

private final int validSpeeds[] = {1, 2, 3, 4, 6, 8};
private final int maxSpeed = 6;

private int currentSpeed = 3;
private short[] screenData;
private Timer timer;

public Model() {

    loadImages();
    initVariables();
    addKeyListener(new TAdapter());
    setFocusable(true);
    initGame();
}


private void loadImages() {
    down = new ImageIcon("/src/images/down.gif").getImage();
    up = new ImageIcon("/src/images/up.gif").getImage();
    left = new ImageIcon("/src/images/left.gif").getImage();
    right = new ImageIcon("/src/images/right.gif").getImage();
    ghost = new ImageIcon("/src/images/ghost.gif").getImage();
    heart = new ImageIcon("/src/images/heart.png").getImage();

}
   private void initVariables() {

    screenData = new short[N_BLOCKS * N_BLOCKS];
    d = new Dimension(400, 400);
    ghost_x = new int[MAX_GHOSTS];
    ghost_dx = new int[MAX_GHOSTS];
    ghost_y = new int[MAX_GHOSTS];
    ghost_dy = new int[MAX_GHOSTS];
    ghostSpeed = new int[MAX_GHOSTS];
    dx = new int[4];
    dy = new int[4];

    timer = new Timer(40, this);
    timer.start();
}

private void playGame(Graphics2D g2d) {

    if (dying) {

        death();

    } else {

        movePacman();
        drawPacman(g2d);
        moveGhosts(g2d);
        checkMaze();
    }
}

private void showIntroScreen(Graphics2D g2d) {

    String start = "Press SPACE to start";
    g2d.setColor(Color.yellow);
    g2d.drawString(start, (int) ((SCREEN_SIZE)/3.25), 150);
}

private void drawScore(Graphics2D g) {
    g.setFont(smallFont);
    g.setColor(new Color(5, 181, 79));
    String s = "Score: " + score;
    g.drawString(s, SCREEN_SIZE / 2 + 96, SCREEN_SIZE + 16);

    for (int i = 0; i < lives; i++) {
        g.drawImage(heart, i * 28 + 8, SCREEN_SIZE + 1, this);
    }
}

private void checkMaze() {

    int i = 0;
    boolean finished = true;

    while (i < N_BLOCKS * N_BLOCKS && finished) {

        if ((screenData[i] & 48) != 0) {
            finished = false;
        }

        i++;
    }

    if (finished) {

        score += 50;

        if (N_GHOSTS < MAX_GHOSTS) {
            N_GHOSTS++;
        }

        if (currentSpeed < maxSpeed) {
            currentSpeed++;
        }

        initLevel();
    }
}

private void death() {

    lives--;

    if (lives == 0) {
        inGame = false;
    }

    continueLevel();
}

private void moveGhosts(Graphics2D g2d) {

    int pos;
    int count;

    for (int i = 0; i < N_GHOSTS; i++) {
        if (ghost_x[i] % BLOCK_SIZE == 0 && ghost_y[i] % BLOCK_SIZE == 0) {
            pos = ghost_x[i] / BLOCK_SIZE + N_BLOCKS * (int) (ghost_y[i] / BLOCK_SIZE);

            count = 0;

            if ((screenData[pos] & 1) == 0 && ghost_dx[i] != 1) {
                dx[count] = -1;
                dy[count] = 0;
                count++;
            }

            if ((screenData[pos] & 2) == 0 && ghost_dy[i] != 1) {
                dx[count] = 0;
                dy[count] = -1;
                count++;
            }

            if ((screenData[pos] & 4) == 0 && ghost_dx[i] != -1) {
                dx[count] = 1;
                dy[count] = 0;
                count++;
            }

            if ((screenData[pos] & 8) == 0 && ghost_dy[i] != -1) {
                dx[count] = 0;
                dy[count] = 1;
                count++;
            }

            if (count == 0) {

                if ((screenData[pos] & 15) == 15) {
                    ghost_dx[i] = 0;
                    ghost_dy[i] = 0;
                } else {
                    ghost_dx[i] = -ghost_dx[i];
                    ghost_dy[i] = -ghost_dy[i];
                }

            } else {

                count = (int) (Math.random() * count);

                if (count > 3) {
                    count = 3;
                }

                ghost_dx[i] = dx[count];
                ghost_dy[i] = dy[count];
            }

        }

        ghost_x[i] = ghost_x[i] + (ghost_dx[i] * ghostSpeed[i]);
        ghost_y[i] = ghost_y[i] + (ghost_dy[i] * ghostSpeed[i]);
        drawGhost(g2d, ghost_x[i] + 1, ghost_y[i] + 1);

        if (pacman_x > (ghost_x[i] - 12) && pacman_x < (ghost_x[i] + 12)
                && pacman_y > (ghost_y[i] - 12) && pacman_y < (ghost_y[i] + 12)
                && inGame) {

            dying = true;
        }
    }
}

private void drawGhost(Graphics2D g2d, int x, int y) {
    g2d.drawImage(ghost, x, y, this);
    }

private void movePacman() {

    int pos;
    short ch;

    if (pacman_x % BLOCK_SIZE == 0 && pacman_y % BLOCK_SIZE == 0) {
        pos = pacman_x / BLOCK_SIZE + N_BLOCKS * (int) (pacman_y / BLOCK_SIZE);
        ch = screenData[pos];

        if ((ch & 16) != 0) {
            screenData[pos] = (short) (ch & 15);
            score++;
        }

        if (req_dx != 0 || req_dy != 0) {
            if (!((req_dx == -1 && req_dy == 0 && (ch & 1) != 0)
                    || (req_dx == 1 && req_dy == 0 && (ch & 4) != 0)
                    || (req_dx == 0 && req_dy == -1 && (ch & 2) != 0)
                    || (req_dx == 0 && req_dy == 1 && (ch & 8) != 0))) {
                pacmand_x = req_dx;
                pacmand_y = req_dy;
            }
        }

        // Check for standstill
        if ((pacmand_x == -1 && pacmand_y == 0 && (ch & 1) != 0)
                || (pacmand_x == 1 && pacmand_y == 0 && (ch & 4) != 0)
                || (pacmand_x == 0 && pacmand_y == -1 && (ch & 2) != 0)
                || (pacmand_x == 0 && pacmand_y == 1 && (ch & 8) != 0)) {
            pacmand_x = 0;
            pacmand_y = 0;
        }
    } 
    pacman_x = pacman_x + PACMAN_SPEED * pacmand_x;
    pacman_y = pacman_y + PACMAN_SPEED * pacmand_y;
}

private void drawPacman(Graphics2D g2d) {

    if (req_dx == -1) {
        g2d.drawImage(left, pacman_x + 1, pacman_y + 1, this);
    } else if (req_dx == 1) {
        g2d.drawImage(right, pacman_x + 1, pacman_y + 1, this);
    } else if (req_dy == -1) {
        g2d.drawImage(up, pacman_x + 1, pacman_y + 1, this);
    } else {
        g2d.drawImage(down, pacman_x + 1, pacman_y + 1, this);
    }
}

private void drawMaze(Graphics2D g2d) {

    short i = 0;
    int x, y;

    for (y = 0; y < SCREEN_SIZE; y += BLOCK_SIZE) {
        for (x = 0; x < SCREEN_SIZE; x += BLOCK_SIZE) {

            g2d.setColor(new Color(0,72,251));
            g2d.setStroke(new BasicStroke(5));

            if ((levelData[i] == 0)) { 
                g2d.fillRect(x, y, BLOCK_SIZE, BLOCK_SIZE);
             }

            if ((screenData[i] & 1) != 0) { 
                g2d.drawLine(x, y, x, y + BLOCK_SIZE - 1);
            }

            if ((screenData[i] & 2) != 0) { 
                g2d.drawLine(x, y, x + BLOCK_SIZE - 1, y);
            }

            if ((screenData[i] & 4) != 0) { 
                g2d.drawLine(x + BLOCK_SIZE - 1, y, x + BLOCK_SIZE - 1,
                        y + BLOCK_SIZE - 1);
            }

            if ((screenData[i] & 8) != 0) { 
                g2d.drawLine(x, y + BLOCK_SIZE - 1, x + BLOCK_SIZE - 1,
                        y + BLOCK_SIZE - 1);
            }

            if ((screenData[i] & 16) != 0) { 
                g2d.setColor(new Color(255,255,255));
                g2d.fillOval(x + 10, y + 10, 6, 6);
           }

            i++;
        }
    }
}

private void initGame() {

    lives = 3;
    score = 0;
    initLevel();
    N_GHOSTS = 6;
    currentSpeed = 3;
}

private void initLevel() {

    int i;
    for (i = 0; i < N_BLOCKS * N_BLOCKS; i++) {
        screenData[i] = levelData[i];
    }

    continueLevel();
}

private void continueLevel() {

    int dx = 1;
    int random;

    for (int i = 0; i < N_GHOSTS; i++) {

        ghost_y[i] = 4 * BLOCK_SIZE; //start position
        ghost_x[i] = 4 * BLOCK_SIZE;
        ghost_dy[i] = 0;
        ghost_dx[i] = dx;
        dx = -dx;
        random = (int) (Math.random() * (currentSpeed + 1));

        if (random > currentSpeed) {
            random = currentSpeed;
        }

        ghostSpeed[i] = validSpeeds[random];
    }

    pacman_x = 7 * BLOCK_SIZE;  //start position
    pacman_y = 11 * BLOCK_SIZE;
    pacmand_x = 0;  //reset direction move
    pacmand_y = 0;
    req_dx = 0;     // reset direction controls
    req_dy = 0;
    dying = false;
}


public void paintComponent(Graphics g) {
    super.paintComponent(g);

    Graphics2D g2d = (Graphics2D) g;

    g2d.setColor(Color.black);
    g2d.fillRect(0, 0, d.width, d.height);

    drawMaze(g2d);
    drawScore(g2d);

    if (inGame) {
        playGame(g2d);
    } else {
        showIntroScreen(g2d);
    }

    Toolkit.getDefaultToolkit().sync();
    g2d.dispose();
}


//controls
class TAdapter extends KeyAdapter {

    @Override
    public void keyPressed(KeyEvent e) {

        int key = e.getKeyCode();

        if (inGame) {
            if (key == KeyEvent.VK_LEFT) {
                req_dx = -1;
                req_dy = 0;
            } else if (key == KeyEvent.VK_RIGHT) {
                req_dx = 1;
                req_dy = 0;
            } else if (key == KeyEvent.VK_UP) {
                req_dx = 0;
                req_dy = -1;
            } else if (key == KeyEvent.VK_DOWN) {
                req_dx = 0;
                req_dy = 1;
            } else if (key == KeyEvent.VK_ESCAPE && timer.isRunning()) {
                inGame = false;
            } 
        } else {
            if (key == KeyEvent.VK_SPACE) {
                inGame = true;
                initGame();
            }
        }
    }
}
@Override
public void actionPerformed(ActionEvent e) {
    repaint();
}
}

package pacman;

import javax.swing.JFrame;

public class Pacman extends JFrame{


private static final long serialVersionUID = 1L;


public Pacman() {
    add(new Model());
}


public static void main(String[] args) {
    Pacman pac = new Pacman();
    pac.setVisible(true);
    pac.setTitle("Pacman");
    pac.setSize(380,420);
    pac.setDefaultCloseOperation(EXIT_ON_CLOSE);
    pac.setLocationRelativeTo(null);

}
}

---

是否确保图像路径正确，例如尝试将图像作为

文件加载，然后检查其是否存在？您是否尝试创建一个，在本例中，只是一个显示您的一个图像的框架，如果是这样，这是否也不起作用？1）不要标记IDE。Eclipse与该问题无关。2） “我有一个错误”总是复制/粘贴错误和异常输出！（作为问题的答案。使用代码格式并包括整个堆栈跟踪。）3）应用程序资源在部署时将成为嵌入式资源，因此明智的做法是立即开始访问它们，就好像它们是嵌入式资源一样。必须通过URL而不是文件访问。有关如何形成URL的信息，请参见。。。。4） 请参阅&5）提示：添加@MDK（或任何人，
@
很重要）以通知此人新的评论。我记得，先用一个图像调试它。让它工作起来，剩下的应该很简单。
newimageicon（“/src/images/down.gif”）
尝试从根目录的子目录（不存在的）
src
目录加载图像。我认为，如果你仔细阅读绝对文件名和相对文件名，你就会理解构造函数失败的原因。如果你解决了问题，请添加一个解释你所做的事情的答案，或者如果这是一个来自评论的解决方案，让评论者知道，这样他们就可以添加答案（并获得他们应得的声誉），因此，未来的读者也可以从您的解决方案中受益。您是否确保图像路径正确，例如，尝试将图像作为
文件加载，然后检查它是否存在？您是否尝试创建一个，在本例中，只是一个显示您的一个图像的框架，如果是这样，这是否也不起作用？1）不要标记IDE。Eclipse与该问题无关。2） “我有一个错误”总是复制/粘贴错误和异常输出！（作为问题的答案。使用代码格式并包括整个堆栈跟踪。）3）应用程序资源在部署时将成为嵌入式资源，因此明智的做法是立即开始访问它们，就好像它们是嵌入式资源一样。必须通过URL而不是文件访问。有关如何形成URL的信息，请参见。。。。4） 请参阅&5）提示：添加@MDK（或任何人，
@
很重要）以通知此人新的评论。我记得，先用一个图像调试它。让它工作起来，剩下的应该很简单。
newimageicon（“/src/images/down.gif”）
尝试从根目录的子目录（不存在的）
src
目录加载图像。我认为，如果你仔细阅读绝对文件名和相对文件名，你就会理解构造函数失败的原因。如果你解决了问题，请添加一个解释你所做的事情的答案，或者如果这是一个来自评论的解决方案，让评论者知道，这样他们就可以添加答案（并获得他们应得的声誉），因此，未来的读者也可以从您的解决方案中受益。