Plugin crashes netbeans editor completely in newer versions auf netbeans

[Ralf-Jonas]

I have several gradle projects that I usually have open in parallel in one window (a big advantage over IDEA). But one of these Gradle projects is quite old and written in ISO-8859-1. Unfortunately, Netbeans can't handle character sets in Gradle projects (or read the character set from gradle.properties), so I have to decide whether I have set my editor to UTF-8 or ISO-8859-1 by changing nb.conf.
I know this plugin works in older netbeans versions, but since netbeans version 15 or so this plugin doesn't work anymore. Normally I have my Netbeans configured to work with UTF-8. So when I load a source file from an older project (written in ISO-8859-1) and use your plugin to select exactly that character set, the cursor disappears and the editor seems to be read-only. I have to restart Netbeans completely to make it work again.
The plugin seems to work instead if I use ‘File -> Open in encoding’, but then I have to navigate through my directory instead of being able to open the file from the project browser. So this means that opening a file in a specific encoding works, but switching between encodings in an already open file crashes.

[junichi11]

Can you write your exact steps to reproduce it.

e.g.

// example code

Steps to reproduce

Actual result

something

Expected result

something

[Ralf-Jonas]

Well, all I can do is to repeat my coment from above:

1.) Open an ISO-8859-1 (our windows charset) Java-File in a NetBeans, that is configured to UTF-8 with "-Dfile.encoding=UTF-8"
2.) Use the plugin to change the charset from utf-8 to iso-8859-1
3.) Editor is read-only and cursor disappears.

Unfortunately NetBeans does not gather the charset from out of the gradle.properties und you can't set a charset for a gradle project. Nearly all of our projects are meanwhile in utf-8, but some other are still in iso-8859-1 / win-1252.