[1.12.2] Registering Items and Blocks

[Cipher Zero X]

What is the best way to register blocks and items? I am a beginning programmer trying to make a mod for Minecraft 1.12.2. Below are screenshots of my current registries in Eclipse Oxygen.

[Matryoshika]

Code Style #1.

There is no such thing as "Common Proxy". It's a misnomer. Proxies handled by @SidedProxy are either Client-Side only, or Server-side only. There are no other alternatives.
As such, the way you are doing this right now, the client will not have any idea what these items are.

 

I have a GitHub project here made for 1.10 (works just fine for 1.12.2) that shows how to use the Register event for registering your objects, and quite animatedly commenting on common bad practices that should be avoided.