Which class does Minecraft use to save block in memory?

To add block in my mod I assign class of this block to variable in my mod registry and add it to List in that registry. That List has type parameter Block. All my blocks classes extend this Block.

So I create a lot of things in these mod blocks and I want to know does Minecraft create instance of these mod blocks in chunk grid to store theme or these blocks classes is needed only to identify block and their instances are created only once in that mod registry?

Edited August 26, 20196 yr by AntonBespoiasov