Nammu edition doesn't work well with Java 9

[raquelalegre]

No description provided.

[ageorgou]

java -version

java version "9"
Java(TM) SE Runtime Environment (build 9+181)
Java HotSpot(TM) 64-Bit Server VM (build 9+181, mixed mode)

java -jar nammu-1.1.0.jar gives the following messages:

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.python.core.PySystemState (file:/Users/ageorgou/Downloads/nammu-1.1.0.jar) to method java.io.Console.encoding()
WARNING: Please consider reporting this to the maintainers of org.python.core.PySystemState
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Jul 04, 2018 1:16:09 PM org.python.netty.util.internal.PlatformDependent
INFO: Your platform does not provide complete low-level API for accessing direct buffers reliably. Unless explicitly requested, heap buffer will always be preferred to avoid potential system unstability.

Nammu launches successfully, but there is no syntax highlighting, and every keystroke gives this error (the characters appear normally in the editor pane):

Exception in thread "AWT-EventQueue-0" Traceback (most recent call last):
File "pyclasspath/nammu/view/AtfEditArea.py", line 91, in replaceSelection
File "pyclasspath/nammu/view/AtfAreaView.py", line 319, in undoableEditHappened
AttributeError: 'javax.swing.text.AbstractDocument$DefaultDocumentE' object has no attribute 'getType'
Exception in thread "AWT-EventQueue-0" Traceback (most recent call last):
File "pyclasspath/nammu/view/AtfAreaView.py", line 269, in keyReleased
File "pyclasspath/nammu/controller/AtfAreaController.py", line 299, in syntax_highlight
File "pyclasspath/nammu/view/SyntaxHighlighter.py", line 192, in syntax_highlight
File "pyclasspath/nammu/view/AtfAreaView.py", line 319, in undoableEditHappened
AttributeError: 'javax.swing.text.AbstractDocument$DefaultDocumentE' object has no attribute 'getType'

Possibly unrelated but, if an existing ATF file is opened, any new text typed seems to be added from right to left.

The same thing happens with version 1.0.0.