0
我按照這個教程hereApplet未顯示圖像
我下載了它的源代碼並運行但圖像沒有顯示。
這裏是結果 
我期待的結果會是這樣 
相同結果的教程。
下面是代碼： StartingClass.java
package kiloboltgame;
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 StartingClass 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);
addKeyListener(this);
Frame frame = (Frame) this.getParent().getParent();
frame.setTitle("Q-Bot Alpha");
try {
base = getDocumentBase();
} catch (Exception e) {
// TODO: handle exception
System.out.println(e.toString());
}
// Image Setups
character = getImage(base, "data/character.png");
System.out.println(" "+base);
}
@Override
public void start() {
robot = new Robot();
Thread thread = new Thread(this);
thread.start();
}
@Override
public void stop() {
// TODO Auto-generated method stub
}
@Override
public void destroy() {
// TODO Auto-generated method stub
}
@Override
public void run() {
while (true) {
robot.update();
repaint();
try {
Thread.sleep(17);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
@Override
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);
}
@Override
public void paint(Graphics g) {
g.drawImage(character, robot.getCenterX() - 61, robot.getCenterY() - 63, this);
}
@Override
public void keyPressed(KeyEvent e) {
switch (e.getKeyCode()) {
case KeyEvent.VK_UP:
System.out.println("Move up");
break;
case KeyEvent.VK_DOWN:
System.out.println("Move down");
break;
case KeyEvent.VK_LEFT:
robot.moveLeft();
break;
case KeyEvent.VK_RIGHT:
robot.moveRight();
break;
case KeyEvent.VK_SPACE:
System.out.println("Jump");
robot.jump();
break;
}
}
@Override
public void keyReleased(KeyEvent e) {
switch (e.getKeyCode()) {
case KeyEvent.VK_UP:
System.out.println("Stop moving up");
break;
case KeyEvent.VK_DOWN:
System.out.println("Stop moving down");
break;
case KeyEvent.VK_LEFT:
robot.stop();
break;
case KeyEvent.VK_RIGHT:
robot.stop();
break;
case KeyEvent.VK_SPACE:
System.out.println("Stop jumping");
break;
}
}
@Override
public void keyTyped(KeyEvent e) {
// TODO Auto-generated method stub
}
}
Robot.java
package kiloboltgame;
import java.awt.Graphics;
public class Robot {
private int centerX = 100;
private int centerY = 382;
private boolean jumped = false;
private int speedX = 0;
private int speedY = 1;
public void update() {
// Moves Character or Scrolls Background accordingly.
if (speedX < 0) {
centerX += speedX;
} else if (speedX == 0) {
//System.out.println("Do not scroll the background.");
} else {
if (centerX <= 150) {
centerX += speedX;
} else {
//System.out.println("Scroll Background Here");
}
}
// Updates Y Position
centerY += speedY;
if (centerY + speedY >= 382) {
centerY = 382;
}
// Handles Jumping
if (jumped == true) {
speedY += 1;
if (centerY + speedY >= 382) {
centerY = 382;
speedY = 0;
jumped = false;
}
}
// Prevents going beyond X coordinate of 0
if (centerX + speedX <= 60) {
centerX = 61;
}
}
public void moveRight() {
speedX = 6;
}
public void moveLeft() {
speedX = -6;
}
public void stop() {
speedX = 0;
}
public void jump() {
if (jumped == false) {
speedY = -15;
jumped = true;
}
}
public int getCenterX() {
return centerX;
}
public int getCenterY() {
return centerY;
}
public boolean isJumped() {
return jumped;
}
public int getSpeedX() {
return speedX;
}
public int getSpeedY() {
return speedY;
}
public void setCenterX(int centerX) {
this.centerX = centerX;
}
public void setCenterY(int centerY) {
this.centerY = centerY;
}
public void setJumped(boolean jumped) {
this.jumped = jumped;
}
public void setSpeedX(int speedX) {
this.speedX = speedX;
}
public void setSpeedY(int speedY) {
this.speedY = speedY;
}
}
，這裏是在intelij我的文件結構
請告訴我錯代碼？？我試圖「../data/character.png」和「../src/data/character.png」，但它沒有奏效。
而是學習AWT的，你爲什麼不學搖擺？您可以從[如何製作小程序]的Swing教程開始（http://docs.oracle.com/javase/tutorial/uiswing/components/applet.html）。 – camickr 2013-04-29 03:37:02
我沒有看到使用awt和swing之間的很多區別。因爲我的目標是對遊戲開發的工作有基本的瞭解^^ – Tifa 2013-04-29 03:38:33
有一個很大的區別。繪畫完成不同，你使用不同的組件。 – camickr 2013-04-29 04:08:39