Cover Page by Herbert Schildt

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CHAPTER 12Enumerations, Autoboxing, and Annotations (Metadata)

This chapter examines three relatively recent additions to the Java language: enumerations, autoboxing, and annotations (also referred to as metadata). Each expands the power of the language by offering a streamlined approach to handling common programming tasks. This chapter also discusses Java’s type wrappers and introduces reflection.

Enumerations

Versions of Java prior to JDK 5 lacked one feature that many programmers felt was needed: enumerations. In its simplest form, an enumeration is a list of named constants. Although Java offered other features that provide somewhat similar functionality, such as final variables, many programmers still missed the conceptual purity of enumerations—especially ...

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