临时文件不会在退出时删除-这是为什么？

Question

I am trying to delete these temp files on exit: - "hsperfdata_user" - "JNativeHook-2.1.0" - "jna-196922"

It doesn't appear that they are deleting!

if (temp != null) {
    for (File file : temp.listFiles()) {
        if (file.getName().contains("JNative") || file.getName().contains("rar") || file.getName().contains("hsper") || file.getName().contains("jna") || file.getName().contains("dll")) {
            file.deleteOnExit();
            System.out.println(file.getName());
        }
    }
}

The "duplicate" question refers to deleting files that you have created - I haven't created these temp. files deliberately. They create automatically.

Answer 1

It's not possible on Windows because the DLL is still loaded into the VM when it tries to delete itself. If it's a problem, the file should be permanently unpacked to the installation location and the appropriate java.library.path set. I would like to reiterate that this is not possible because java does not provide an System.unload(...) method to remove the library from the JVM safely due to technical restriction.

It maybe possible: https://github.com/kwhat/jnativehook/issues/148#issuecomment-282173982