September 2021
Intermediate to advanced
544 pages
13h 25m
German
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Kapitel 4: Generics
4.1 Die Generizität
Die Generizität wurde für Java mit der Version 5.0 eingeführt, um die Prüfung der Typsicherheit von Daten zu erweitern und weitestgehend an den Compiler zu übergeben. Damit werden dem Anwender aufwendige Tests für das Prüfen von Fehlerquellen erspart, die in diesem Zusammenhang in Programmen erforderlich waren.
Generische Datentypen benutzen in ihrer Deklaration Typparameter. Ein Typparameter besteht aus einer oder mehreren Typvariablen, die mit Typ-Schranken (»bounds«) versehen werden können. Werden in der Definition von generischen Klassen bzw. generischen Interfaces die Typvariablen durch aktuelle Typen ersetzt, entstehen die sogenannten parametrisierten Typen. Das heißt, dass parametrisierte ...
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