FULL PRODUCT VERSION :
openjdk version "1.8.0_65"
OpenJDK Runtime Environment (build 1.8.0_65-b17)
OpenJDK 64-Bit Server VM (build 25.65-b01, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Linux Centos72 3.10.0-327.4.4.el7.x86_64 #1 SMP Tue Jan 5 16:07:00 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux


A DESCRIPTION OF THE PROBLEM :
I have installed RedHat 7.1 on a PC DELL..

I have installed the packages required by Oracle 12c and I can successfully install Oracle( ./runInstaller) with the graphical interface.

I re-install RedHat 7.1 on the same PC and I update the system, which installs about 500 packages.
so the REDHat version is set to 7.2

I install the packages required required by Oracle 12c and now, I CANNOT install Oracle 12c : on step 5, I have the error :

java.lang No ClassDefFound Error : Could not initialize class java.awt.dnd.DragSource

I have exactly the same problem when using Centos 7.0 instead of Redhat7.1. Centos is set to version 7.2.


ERROR MESSAGES/STACK TRACES THAT OCCUR :
java.lang No ClassDefFound Error : Could not initialize class java.awt.dnd.DragSource

(I have a screen shot if necssary)

REPRODUCIBILITY :
This bug can be reproduced always.