Eclipse is too big under Gnome (Fedora 23)

To make eclipse looks more nicer (similar look as on Windows machines) perform following steps:

1. Create new eclipse launcher and pass GTK version 2 as parameter

   [Desktop Entry]
   Encoding=UTF-8
   Name=Eclipse IDE
   Exec=/opt/eclipse.4.5.2/eclipse --launcher.GTK_version 2
   Icon=/opt/eclipse.4.5.2/icon.xpm
   Type=Application
   Categories=Development;
   

2. Create configuration file ~/.gtkrc-2.0 with following content:

   style "gtkcompact" { 
     font_name="Sans 8"
     GtkButton::defaultborder={0,0,0,0} 
     GtkButton::defaultoutsideborder={0,0,0,0} 
     GtkButtonBox::childminwidth=0 
     GtkButtonBox::childminheigth=0 
     GtkButtonBox::childinternalpadx=0 
     GtkButtonBox::childinternalpady=0 
     GtkMenu::vertical-padding=1 
     GtkMenuBar::internalpadding=0 
     GtkMenuItem::horizontalpadding=4
     GtkToolbar::internal-padding=0 
     GtkToolbar::space-size=0 
     GtkOptionMenu::indicatorsize=0 
     GtkOptionMenu::indicatorspacing=2 
     GtkPaned::handlesize=4 
     GtkRange::troughborder=0 
     GtkRange::stepperspacing=0 
     GtkScale::valuespacing=0 
     GtkScrolledWindow::scrollbarspacing=0 
     GtkExpander::expandersize=10 
     GtkExpander::expanderspacing=0 
     GtkTreeView::vertical-separator=0 
     GtkTreeView::horizontal-separator=0 
     GtkTreeView::expander-size=8 
     GtkTreeView::fixed-height-mode=TRUE 
     GtkWidget::focuspadding=1 
   } 
   class "GtkWidget" style "gtkcompact"
   
   style "gtkcompactextra" { 
     xthickness=2 ythickness=2 
   } 
   class "GtkButton" style "gtkcompactextra"
   class "GtkToolbar" style "gtkcompactextra"
   class "GtkPaned" style "gtkcompactextra"