Install JDeveloper 12c Java Edition Oracle Linux 6.X
The Guide shows you How to Install Oracle JDeveloper 12c Java Edition for Oracle Linux 6.x i686/x8664 Desktop.
This JDeveloper Release contains only the core Java and XML features, it doesn’t contain J2EE, ADF, UML and Database features.
The Only Requirement is a Working Oracle JDK 8+ Installation on System and So Below you Find Link to Installation Guide.

Download Oracle JDeveloper 12c Java Edition for Linux
Right-Click > Open with Archive Manager.
And Extract Into /tmp
Open a Terminal Window
(Press “Enter” to Execute Commands)In case first see: Terminal QuickStart Guide.
Relocate JDeveloper Java Edition.
System Wide Installation:
su -c "mv /tmp/jdeveloper /opt/"
Local Installation:
mv /tmp/jdeveloper $HOME
How to Create a JDeveloper Desktop Launcher
How to Install Recommended Oracle JDK on Oracle Linux