图像不会出现在applet中

Question

编辑：This帖子表明这是IDE特定的问题，但给出的解决方案是IntelliJ。我正在使用Eclipse。

我正在关注Android游戏编程的this指南。但在此之前，它教授用Java进行游戏编程。

当我尝试在指南中指定的小程序中加载图像时，不显示任何内容，只显示黑色背景。我的源代码和网络代码几乎完全相同，我该如何解决？

这是我的代码：

package game;

import java.applet.Applet;
import java.awt.Color;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.net.URL;

public class Incio extends Applet implements Runnable, KeyListener {

private Robot robot;
private Image image, character;
private Graphics second;
private URL base;

@Override
public void init() {
    setSize(800, 480);
    setBackground(Color.black);
    setFocusable(true);
    Frame frame = (Frame) this.getParent().getParent();
    frame.setTitle("LAS AVENTURAS DE RABOCOP");
    addKeyListener(this);
    robot = new Robot();
    try {
        base = getDocumentBase();
        } catch (Exception e) {
        // TODO: handle exception
        }
    character = getImage(base, "/src/data/Robot.bmp");
    System.out.println(base);
}

@Override
public void start() {
    // TODO Auto-generated method stub
}

@Override
public void stop() {
    // TODO Auto-generated method stub
}

@Override
public void destroy() {
    // TODO Auto-generated method stub
}

@Override
public void keyPressed(KeyEvent k) {
    switch (k.getKeyCode()) {
    case KeyEvent.VK_UP:

        break;

    case KeyEvent.VK_DOWN:
        break;

    case KeyEvent.VK_RIGHT:
        break;

    case KeyEvent.VK_LEFT:
        break;

    case KeyEvent.VK_SPACE:
        break;

    }
}

@Override
public void keyReleased(KeyEvent k) {
    switch (k.getKeyCode()) {
    case KeyEvent.VK_UP:

        break;

    case KeyEvent.VK_DOWN:
        break;

    case KeyEvent.VK_RIGHT:
        break;

    case KeyEvent.VK_LEFT:
        break;

    case KeyEvent.VK_SPACE:
        break;

    }
}

@Override
public void keyTyped(KeyEvent arg0) {
    // TODO Auto-generated method stub

}

@Override
public void run() {
    // TODO Auto-generated method stub
    while (true) {

        robot.update();
        repaint();
        try {
            Thread.sleep(17);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

public void update(Graphics g) {
    if (image == null) {
        image = createImage(this.getWidth(), this.getHeight());
        second = image.getGraphics();
    }

    second.setColor(getBackground());
    second.fillRect(0, 0, getWidth(), getHeight());
    second.setColor(getForeground());
    paint(second);

    g.drawImage(image, 0, 0, this);
}

public void paint(Graphics g) {
    g.drawImage(character, robot.getCenterX()-61, robot.getCenterY()-63, this);
}
}

感谢。