可繼承的JAVA列舉

Abstract

Java 1.5加入許多新功能，包含enumeration。Java內部將enumeration做成class的形式，使得其constants就為instances，有著更強大的支援，附帶有variable、method等功能，不再只是單純的數字。但在class的條件之下，enumeration卻不行使用繼承的用法，以致與Java的核心概念有所衝突。因此本論文試著提出可繼承的Java enumeration，讓enumeration更為彈性，並且可在不更動Virtual Machine的前提之下能夠執行。

Java 1.5 adds many new features, including enumeration. It implements enumeration as class. It translates enumeration constants into class instances, so that an enumeration constant is not a pure number. Now, enumeration constant has variables and methods, and it is more powerful. However, inheritance between enumeration is not allowed in Java 1.5.This violates the kernel principle of object-oriented concept. In this thesis, we try to resolve this problem. Under the condition of not changing Java virtual machine, we try to make Java enumeration be inheritable.