检索ImageIcon的路径 [英] Retrieve the path of an ImageIcon

问题描述

是否可以获取创建ImageIcon的文件的位置？

Is it possible to get the location of the file that an ImageIcon was created from?

内部ImageIcon有一个位置的临时私有URL，在调试时会显示它的路径，但我无法弄清楚如何访问它。有什么建议吗？

Internally ImageIcon has a transient private URL of its location, which when debugging will show its path, but I can't figure out how to access it. Any suggestions?

这就是我的意思，

public String getPath(ImageIcon icon){
    return ????;
}

推荐答案

您可以使用反射来访问私有字段，但如果 ImageIcon 未使用 URL 创建，则该字段将为空。如果您自己创建 ImageIcon ，则可以在地图中跟踪 URL 。

You can use reflection to access the private field, but if the ImageIcon wasn't created with a URL the field will be null. If you are creating the ImageIcons yourself you could keep track of the URLs in a map.

ImageIcon icon = ...
Class<? extends ImageIcon> clazz = icon.getClass();
Field urlField = clazz.getDeclaredField("location");
urlField.setAccessible(true);

URL location = (URL) urlField.get(icon);

同样值得考虑的是，未来版本中的字段名称可能会发生变化，这可能会产生异常。

It is also worth considering that the field name may change in future versions, which may produce exceptions.

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