YES, THERE IS A WAY TO DO IT
You will need to configure 3 things in order to get your dark UI.
1) Java Editor Colors
This is the source code edition area. You can use http://eclipsecolorthemes.org/ for the editor part, though those colors can be manually edited by default.
2) Eclipse UI
The UI colors can be edited with the addin Chrome Theme which can be found in the eclipse market place or in the following link https://github.com/jeeeyul/eclipse-themes/. If you want a dark theme just edit away until you find the colors that suit you.
3) Final touches
After doing the previous steps, some colors will still match the OS colors. To darken what's left, just get the pre-baked Dark Juno theme from https://github.com/eclipse-color-theme/eclipse-ui-themes. Download the zip file and unzip it into your dropins folder (which is located in your eclipse folder). If the dropins folder doesn't exist, just create it.
Restart eclipse and you are set.