Jar 文件执行错误 Java/Eclipse

Question

I am having trouble with an exported jar for a game I made in Java. The game is due to be presented tomorrow and the jar will not execute.

I am running command java -jar filename.jar

Here is a part of the stack trace in the cmd prompt:

Image load failed: Resources/Images/shop/jet.png
javax.imageio.IIOException: Can't read input file!
        at javax.imageio.ImageIO.read(Unknown Source)
        at ImageLoader.loadImage(ImageLoader.java:21)
        at ImageLoader.loadScaledImage(ImageLoader.java:34)
        at ImgButton.<init>(ImgButton.java:18)
        at Carnies.createButtons(Carnies.java:343)
        at Carnies.simpleInitialize(Carnies.java:82)
        at Frame.<init>(Frame.java:90)
        at Carnies.<init>(Carnies.java:64)
        at CarnieRunner.makeGUI(CarnieRunner.java:62)
        at CarnieRunner.<init>(CarnieRunner.java:27)
        at CarnieRunner.main(CarnieRunner.java:131)
Exception in thread "main" java.lang.ExceptionInInitializerError
        at Carnies.createButtons(Carnies.java:361)
        at Carnies.simpleInitialize(Carnies.java:82)
        at Frame.<init>(Frame.java:90)
        at Carnies.<init>(Carnies.java:64)
        at CarnieRunner.makeGUI(CarnieRunner.java:62)
        at CarnieRunner.<init>(CarnieRunner.java:27)
        at CarnieRunner.main(CarnieRunner.java:131)
Caused by: java.lang.NullPointerException
        at GifHandler.<init>(GifHandler.java:15)
        at GifHandler.<clinit>(GifHandler.java:7)
        ... 7 more

It appears the problem is that my images aren't loading. Here is the line in the program that handles the image loading:

public static BufferedImage loadImage(String fileName) {
        try { 
            File file;
            file = new File(fileName);           
            BufferedImage sub = ImageIO.read(file); 
            return toCompatibleImage(sub);
        }
        catch (IOException e) { 
            System.out.println("Image load failed: " +fileName);
            e.printStackTrace();
            return null;
        }
    }

This all works beautifully in eclipse but no luck on the Jar. Any advice would be wonderful. If having the entirety of my project would help troubleshoot it's located publically at github.com/madamsmall/carnie Thank you!

Answer 1

jar 文件中的 Image 不再是File ，您需要更改代码以将其作为类路径中的资源读取

Answer 2

Could you please look inside of the .jar file and see if this location exist "Resources/Images/shop/" and if the file is being packaged correctly?

The only time I have seen this behavior is when the package instruction on a POM file (Maven) is incorrect.

Thanks.

My bad, totally miss that, that answer is correct is a resource.