What variables are visible to a thread? What does a thread store in shared memory when volatile?

Question

Java

When using volatile on a single object, all thread-visible objects will be written to the shared memory, not just a single volatile object.
I have no understanding of "objects and variables visible to a thread". Is that all that is used in the run() method? or generally everyone in the class. And if the thread is in a separate file, then what?

Or I have a class and I create a thread inside this class simply through new Thread() { *run method* }
I would be infinitely happy if someone explained to me in an accessible way what exactly the thread sees and will store only in shared memory when using volatile.

Answer 1

And here C#?
What components will be used? Is there a diagram of the device?
Is the servomotor not redundant for use as a damper? Maybe something simpler to apply - based on solenoids for example?
In the general case, the problem is solved. But you need to improve your device design skills, at least for a competent formulation of the problem.

Answer 2

There are examples of watering plants on the Amperka.

Answer 3

It is not clear what C# has to do with it. The
weak point is the bending hose, it will not bend for a particularly long time.
It would be more reliable and correct to put a normally closed valve, for example, such
. What exactly do you need help with, write to the mail

Answer 4

What about C#?