Eclipse 4.4 Luna ugly theme with XFCE 4.11

To fix the tooltip, try to disable GTK3 by expoting SWT_GTK3=0. You can do this by creating a .desktop file if not already created (right click on desktop ‘Create Launcher…’, configure it for eclipse). Open the .desktop file with text editor and modify the line holding the execution:

Exec=env SWT_GTK3=0 command_to_launch_eclipse

You can also run eclipse with custom theme setting, so copy your theme from /usr/share/themes/theme_name/.gtkrc to /home/user_name/.gtkrc-eclipse and run eclipse by use command

env GTK2_RC_FILES=/usr/share/themes/your_theme/gtk-2.0/gtkrc:/home/USER/.gtkrc-eclipse ‘/path_to_eclipse/eclipse’

But before changes in custom .gtkrc file, you should to modify
tooltip_fg_color and tooltip_bg_color values

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