Sealed Classes and Sealed Methods

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Abstract classes, Interfaces, and Patterns - slide 9 : 37

Sealed Classes and Sealed Methods

A sealed class C prevents the use of C as base class of other classes

Sealed class
- Cannot be inherited by other classes
- Seals all virtual methods in the class
Sealed method
- Cannot be redefined and overridden in a subclass
- The modifier sealed must be used together with override
  - A sealed, overridden method prevents additional overriding