Go To Window > Preferences > Appearance
Then theme select Dark
There are some settings that can be changed only from the Eclipse Preferences window and that override the theme's settings by default:
Go to Window > Preferences > General > Appearance > Colors and Fonts
then change the colors for Basic > Content Assist background color
and Basic > Content Assist foreground color
(eg. foreground color: #DDD, background color: #333);
Go to Window > Preferences > Run/Debug > Console
and modify the colors as you like
(eg. Standard Out text color: #DDD, Background color: #333);
Go to Window > Preferences > General > Appearance > Colors and Fonts
then change the colors for Java > Javadoc view background
.
Note that the foreground color cannot be changed and depends on system font color.
(taken from the eclipse-ui-theme project)
This theme is based off of Railscasts and looks letter than the default.
Go to Window > Preferences > Java > Editor > Content Assist > Auto-Activation
In your shortcut for eclipse add -Xmx2096m
at the end to increase the java heap size for eclipse to 2GB.