IntelliJ Idea is best Java development environment out there. It can be an IDE or a text editor—configure it however you wish because whatever you do it will be simple. At its simplest you only need 4 settings to make it better out of the box:
- Right margin (columns): 80
- Editor tabs: 100
- Show line numbers: true
- Appearance Theme: IDEA (4.5)
- Key-map:
- Emacs
- Project Toolbar: M:1
- Structure Toolbar: M:2
- Changes Toolbar: M:3
- Font: DejaVu Sans Mono 12