Java does enable the option to mark a class as final ... using the sealed keyword, followed by the permits clause to explicitly name the classes that can extend or implement the sealed class or ...

Abstract classes and interfaces in Java ... example of using abstract classes. The template method pattern manipulates instance variables within concrete methods. From an object-oriented ...

Other goals include aligning final fields in normal classes ... The Java platform provides APIs that allow reassignment of final fields at any time by any code in the program, thus undermining ...