-C 正在更改本地目录，正在寻找那里有 hi.png 。它不能控制你将它注入JAR文件的位置。

-C is changing the local directory, and is looking for hi.png there. It's not controlling where you're trying to inject it into the JAR file.

我会尝试制作一个名为 images $ c的新目录$ c>，将你的本地 hi.png 移动到那里，使 images 当前工作目录的子目录，然后运行这个：

I would try making a new directory called images, moving your local hi.png into that, making images a child directory of your current working directory, then just run this:

jar uf myfile.jar images\hi.png