The default option in the Open file dialog is to only show .java files. There is a preferences pane. Preferences are present to select how the comment will look, to some degree. Single line comments can be allowed for each item type. Preferences are present to tell how to handle private items.
Preferences are present for the tab size and max line length.
There is a preference to tell whether to show the word public, private, etc. The comments were in reverse order. The code display looks much better. User interface is new AppPane style. Uses a Metal theme to get system colors.