Eclipse IDE for C/C++ and Java

Just try to open a *.cpp file in your IDE, Eclipse will then prompt for possible plugins to install. This include the Eclipse C/C++ IDE plugins, that is the "official" one from Eclipse community.

Eclipse is a platform. Install either. Then run it. Click "Help > Install New Software ..." then in the "Work with" drop down select "Neon - http://download.eclipse.org/releases/neon/", then expand "Programming Languages" and select "C/C++" or "Java" as desired.

And you can switch modes with "Window > Perspective > Open Perspective > Other"