Differences between static and instance members

Static member features:

1. If there is a static keyword before a member, the member is a static member.

2. Static members can only be accessed by class name. They cannot be accessed by objects.

3. Static members are shared anywhere. After a place changes, everything changes.

4. The same memory is always used after the static method and static variable are created. You cannot directly call the instance method in the static method.

5. Static members onlyProgramWill be released only when you exit.

5. This cannot be used in static members.

6. Static classes can only contain static members.

7. You can call the static method directly in the instance method. You cannot call the instance method directly in the static method.

8. Static classes only include static members.

9. The static constructor only executes this class once when it is used for the first time.