[英]Loading image from res folder
Iam coding game as part of my homework and I'm trying to load a image from res folder but I'm getting NullPointerException:我将编码游戏作为我作业的一部分,我正在尝试从 res 文件夹加载图像,但我收到 NullPointerException:
```Exception in thread "Thread-0" java.lang.IllegalArgumentException: input == null!
at java.desktop/javax.imageio.ImageIO.read(ImageIO.java:1400)
at prg_hra/esrever.BufferedImageLoader.loadImage(BufferedImageLoader.java:15)
at prg_hra/esrever.Hra.init(Hra.java:38)
at prg_hra/esrever.Hra.run(Hra.java:61)
at java.base/java.lang.Thread.run(Thread.java:834)```
The res folder is already in Java Build Path and I'm 99% sure that I'm putting in the right path. res 文件夹已经在Java 构建路径中,我 99% 确定我输入了正确的路径。 I got BufferedImageLoader Class:我得到了 BufferedImageLoader Class:
public class BufferedImageLoader {
private BufferedImage image;
public BufferedImage loadImage(String path) {
try {
image = ImageIO.read(getClass().getResource(path));
} catch (IOException e) {
e.printStackTrace();
}
return image;
}
and I'm using it in inti metode in game class:我在游戏 class 的 inti metode 中使用它:
private void init() {
WIDTH=getWidth();
HEIGHT=getHeight();
BufferedImageLoader loader = new BufferedImageLoader();
level = loader.loadImage("/res/level.png");
handler = new Handler();
kam=new Kamera(0,0);
handler.addObjekt(new Hrac(100, 100, handler, ObjektID.Hrac));
handler.createLevel();
this.addKeyListener(new KeyInput(handler));
}
I've looked at some similar problems of other people, but they mostly just used wrong path..我看过其他人的一些类似问题,但他们大多只是使用了错误的路径..
EDIT: I also tried level = loader.loadImage("level.png");
编辑:我也试过level = loader.loadImage("level.png");
and level = loader.loadImage("/level.png");
和level = loader.loadImage("/level.png");
neither worked.都没有工作。
Try that level = loader.loadImage("level.png");
试试那个level = loader.loadImage("level.png");
instead of level = loader.loadImage("/res/level.png");
而不是level = loader.loadImage("/res/level.png");
If you are trying get resource you don't need to write resources directory.如果您正在尝试获取资源,则无需编写资源目录。
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