What is the ideal number of properties and methods in a class? What considerations should be made in determining this?
There is no “ideal number of properties and methods”, but there are SOLID principles that you must adhere to if you want to have a good OO design.
But if you try to realize the universe by following the divine anti-pattern object , the number is close to infinity.
Answer: 42. It can be arbitrarily divided between properties and methods.
Make a few "private" because it is more intriguing when objects have something to hide.
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Since good oop methods tend to maximize code reuse, it is likely that a class cannot achieve a very large number of methods or properties without having to split them.
If you follow the SOLID principles , you are likely to get the most suitable number. The number of type members will vary greatly depending on the purpose of that type. There is no magic number available that will fit all cases.
As little as possible, but not less, unless it is required.