在使用文件系统时需要帮助

Question

I'm trying to load an image onto a JPanel. I define an Image as this:

    Image image = ImageIO.read(new File("~/Desktop/Example.png"));

This line returns the following error:

Exception in thread "main" javax.imageio.IIOException: Can't read input file!
    at javax.imageio.ImageIO.read(ImageIO.java:1301)
    at Background.<init>(Background.java:16)

(This is at line 16 of my code)

Answer 1

The tilde character ~ is expanded by a shell so needs to be replaced to be used in Java. You could do

Image image = 
    ImageIO.read(new File(System.getProperty("user.home") + "/Desktop/Example.png"));