Lately I have found myself doing Java development. The default theme is white, but you can change it to dark, similar as in Visual Studio.
First download the theme from here:
http://plugins.netbeans.org/plugin/57669/obsidian-color-theme
Then install it following these instructions:
http://askubuntu.com/questions/107873/how-to-use-a-theme-in-netbeans-7-1
