abstract class in Java can be used to work around Javaa#39;s omission of a facility for passing methods as parameters. ... If a per-instance method in a class is declared final, then each subclass inherits the methoda#39;s implementation and is not allowed to override it. ... whether it updates either the object denoted by its this parameter or the objects denoted by any other reference-type formal parameters.
|Author||:||SIGAda, Association for Computing Machinery. Special Interest Group on Computer Science Education, ACM Sigsoft, ACM AdaEurope|