After installed eclipse in ubuntu 12.04. you may meet the following problem.

Eclipse cannot load SWT libraries

The log looks like belows.

 11         java.lang.UnsatisfiedLinkError: Could not load SWT library. Reasons:

 12         no swt-gtk-3740 in java.library.path

 13         no swt-gtk in java.library.path

 14         Can't load library: ~/.swt/lib/linux/x86_64/libswt-gtk-3740.so

 15         Can't load library: ~/.swt/lib/linux/x86_64/libswt-gtk.so

The solution is: 

echo "-Djava.library.path=/usr/lib/jni/" >> /etc/eclipse.ini

refer from: http://stackoverflow.com/questions/10165693/eclipse-cannot-load-swt-libraries