Someone explain how to make armor stand?

on bedrock you can change the pose without any commands. crouch and interact with it and it cycles through poses, and a redstone signal next to it does the same. java needs commands to give it arms or change the pose.

6 sticks and 1 smooth stone slab. sticks fill the top row, one stick in the middle of the second row, then stick - slab - stick on the bottom. the slab has to be smooth stone, a normal stone slab won't work. so smelt stone into smooth stone first, then make the slabs.