问题
I am sorry if this is a repeat but I already read dozens of posts regarding the issue and I still cant solve it. I am working on a project in java with Intellij IDE (it's actually this game http://www.kilobolt.com/unit-2-creating-a-game-i.html and it appeared on this forum allot). My issue is that the java applet cannot locate any resources (images and texts). getImage() method cant load images with "../data/image.png", nor "/data/image.png", nor the regular "data/image.png". same goes for file reader. I also tried getDocumentBase() instead getCodeBase(). Currently I'm storing images on a local website (IIS locahost) but that's not the solution and besides, i cant use map1.txt that way(i have to use local path). Im sory if i omitted anything of importance.
Note: "Resources.IMAGE" are static fields in a separate class with values as such: "http://localhost/folder/image.png"
Code:
package sinisa;
import java.applet.Applet;
import java.awt.*;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import sinisa.framework.Animation;
public class StartingClass extends Applet implements Runnable, KeyListener {
//TODO: Create constructor for this, and a calculator for speed
private static final int X_SCREEN = 800;
private static final int Y_SCREEN = 480;
private Robot robot;
private Hellboy hellb0;
private Hellboy hellb1;
private Image image;
private Image character;
private Image character2;
private Image character3;
private Image characterDown;
private Image characterJumped;
private Image characterWalkLeft;
private Image characterWalkRight;
private Image background;
private Image currentSprite;
private Image hellboy;
private Image hellboy2;
private Image hellboy3;
private Image hellboy4;
private Image hellboy5;
public static Image tileDirt;
public static Image tileGrassTop;
public static Image tileGrassBot;
public static Image tileGrassLeft;
public static Image tileGrassRight;
public static Image tileOcean;
private URL base;
private Graphics second;
private Animation anim;
private Animation hanim;
private Animation wanim;
private static Background bg1;
private static Background bg2;
private ArrayList<Tile> tileArray = new ArrayList<Tile>();
int i = 0; int j = 0;
@Override
public void init() {
setSize(X_SCREEN, Y_SCREEN);
setBackground(Color.BLACK);
setFocusable(true);
addKeyListener(this);
Frame frame = (Frame) this.getParent().getParent();
frame.setTitle("Game - Alpha 0.1");
try {
base = getCodeBase();
} catch (Exception e) {
e.printStackTrace();
}
character = getImage(base, Resources.CHARACTER);
character2 = getImage(base, Resources.CHARACTER2);
character3 = getImage(base, Resources.CHARACTER3);
characterDown = getImage(base, Resources.CHARACTER_DOWN);
characterJumped = getImage(base, Resources.CHARACTER_JUMPED);
characterWalkLeft = getImage(base, Resources.CHARACTER_WALK_LEFT);
characterWalkRight = getImage(base, Resources.CHARACTER_WALK_RIGHT);
background = getImage(base, Resources.BACKGROUND);
tileDirt = getImage(base, Resources.TILEDIRT);
tileOcean = getImage(base, Resources.TILEOCEAN);
hellboy = getImage(base, Resources.HELLBOY);
hellboy2 = getImage(base, Resources.HELLBOY2);
hellboy3 = getImage(base, Resources.HELLBOY3);
hellboy4 = getImage(base, Resources.HELLBOY4);
hellboy5 = getImage(base, Resources.HELLBOY5);
anim = new Animation();
anim.addFrame(character, 1250);
anim.addFrame(character2, 50);
anim.addFrame(character3, 50);
anim.addFrame(character2, 50);
hanim = new Animation();
hanim.addFrame(hellboy, 100);
hanim.addFrame(hellboy2, 100);
hanim.addFrame(hellboy3, 100);
hanim.addFrame(hellboy4, 100);
hanim.addFrame(hellboy5, 100);
hanim.addFrame(hellboy4, 100);
hanim.addFrame(hellboy3, 100);
hanim.addFrame(hellboy2, 100);
wanim = new Animation();
wanim.addFrame(characterWalkLeft, 50);
wanim.addFrame(character, 50);
wanim.addFrame(characterWalkRight, 50);
currentSprite = anim.getImage();
}
@Override
public void start() {
bg1 = new Background(0, 0);
bg2 = new Background(2160, 0);
try {
loadMap("../data/map1.txt");
} catch (IOException e) {
e.printStackTrace();
}
hellb0 = new Hellboy(340, 360);
hellb1 = new Hellboy(700, 360);
robot = new Robot();
Thread thread = new Thread(this);
thread.start();
}
@Override
public void stop() {
}
@Override
public void destroy() {
}
@Override
public void run() {
while(true) {
if(robot.isJumped()) {
currentSprite = characterJumped;
}
else if(robot.isMovingLeft() || robot.isMovingRight()) {
currentSprite = wanim.getImage();
}
else if(!robot.isJumped() && !robot.isDucked()) {
currentSprite = anim.getImage();
}
robot.update();
ArrayList projectiles = robot.getProjectiles();
for(int i = 0; i < projectiles.size(); i++) {
Projectile p = (Projectile) projectiles.get(i);
if(p.isVisible()) {
p.update();
}
else {
projectiles.remove(i);
}
}
bg1.update();
bg2.update();
updateTiles();
hellb0.update();
hellb1.update();
animate();
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(background, bg1.getBgX(), bg1.getBgY(), this);
g.drawImage(background, bg2.getBgX(), bg2.getBgY(), this);
g.drawImage(hanim.getImage(), hellb0.getCenterX()-48, hellb0.getCenterY()-48, this);
g.drawImage(hanim.getImage(), hellb1.getCenterX()-48, hellb1.getCenterY()-48, this);
paintTiles(g);
g.drawImage(currentSprite, robot.getCenterX() - 61, robot.getCenterY() - 63, this);
ArrayList projectiles = robot.getProjectiles();
for (int i = 0; i < projectiles.size(); i++) {
Projectile p = (Projectile) projectiles.get(i);
g.setColor(Color.YELLOW);
g.fillRect(p.getX(), p.getY(), 10, 5);
}
}
public void animate() {
anim.update(10);
hanim.update(50);
wanim.update(10);
}
private void updateTiles() {
for (int i = 0; i < tileArray.size(); i++) {
Tile t = (Tile) tileArray.get(i);
t.update();
}
}
private void paintTiles(Graphics g) {
for (int i = 0; i < tileArray.size(); i++) {
Tile t = (Tile) tileArray.get(i);
g.drawImage(t.getTileImage(), t.getTileX(), t.getTileY(), this);
}
}
private void loadMap(String filename) throws IOException {
ArrayList lines = new ArrayList();
int width = 0;
int height = 0;
BufferedReader reader = new BufferedReader(new FileReader(filename));
while (true) {
String line = reader.readLine();
// no more lines to read
if (line == null) {
reader.close();
break;
}
if (!line.startsWith("!")) {
lines.add(line);
width = Math.max(width, line.length());
}
}
height = lines.size();
for (int j = 0; j < 12; j++) {
String line = (String) lines.get(j);
for (int i = 0; i < width; i++) {
System.out.println(i + "is i ");
if (i < line.length()) {
char ch = line.charAt(i);
Tile t = new Tile(i, j, Character.getNumericValue(ch));
tileArray.add(t);
}
}
}
}
@Override
public void keyPressed(KeyEvent e) {
switch (e.getKeyCode()) {
case KeyEvent.VK_UP:
System.out.println("Move up");
break;
case KeyEvent.VK_DOWN:
currentSprite = characterDown;
if (!robot.isJumped()){
robot.setDucked(true);
robot.setSpeedX(0);
}
break;
case KeyEvent.VK_LEFT:
robot.moveLeft();
robot.setMovingLeft(true);
break;
case KeyEvent.VK_RIGHT:
robot.moveRight();
robot.setMovingRight(true);
break;
case KeyEvent.VK_SPACE:
robot.jump();
break;
case KeyEvent.VK_CONTROL:
if(!robot.isDucked()) {
robot.shoot();
}
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:
currentSprite = anim.getImage();
robot.setDucked(false);
break;
case KeyEvent.VK_LEFT:
robot.stopLeft();
break;
case KeyEvent.VK_RIGHT:
robot.stopRight();
break;
case KeyEvent.VK_SPACE:
break;
}
}
@Override
public void keyTyped(KeyEvent e) {
}
public static Background getBg1() {
return bg1;
}
public static Background getBg2() {
return bg2;
}
}
Project folder hierarchy:
回答1:
I had the same issue... I fixed it by changing the method to retrieve the base URL.
try {
base = StartingClass.class.getResource("/data/background.png");
} catch (Exception e) {
e.printStackTrace();
}
// Image Setups
character = getImage(base, "character.png");
characterDown = getImage(base, "down.png");
...
回答2:
I tried the code you marked as a correct and working answer but it did not work. For me the following works:
Toolkit toolkit = Toolkit.getDefaultToolkit();
character = toolkit.getImage("/Users/xuser/Projects/Game/src/data/character.png");
character Image is loaded properly this way but it works only for purposes of debugging and local development.
What I am having problems with though is loading the txt file that has level map. Did you solve that? I will update my answer when I find solution for that.
回答3:
If getCodeBase() returns "http://localhost/" and images in "http://localhost/folder/", Resources.IMAGE should be "folder/image.png".
来源：https://stackoverflow.com/questions/19460693/java-applet-cannot-locate-resources