java - What happens when you create a new object?

Ok, so what happens when you do this.

A a1=new A();

A a2=new A();

A a3=new A();

I upload two pictures on how I imagine it being like. Can you tell me what picture is true?

First picture:

Second picture:

I always thought the first picture is true, but now I don't really know, and I suspect the second to be true.

Also, can you explain to me what each side does?
Like, what does "A a1" do and what does "new A()" do?

Thanks.