文件名称:
Java-Language-SpecV3.0
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文件大小: 7mb
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上传时间: 2010-01-20
详细说明： Java语言的细致说明 如CLASS，它这样说： CLASS declarations define new reference types and describe how they are implemented (§8.1). A nested class is any class whose declaration occurs within the body of another class or interface. A top level class is a class that is not a nested class. This chapter discusses the common semantics of all classes—top level (§7.6) and nested (including member classes (§8.5, §9.5), local classes (§14.3) and anon- ymous classes (§15.9.5)). Details that are specific to particular kinds of classes are discussed in t he sections dedicated to these constructs. A named class may be declared abstract (§8.1.1.1) and must be declared abstract if it is incompletely implemented; such a class cannot be instantiated, but can be extended by subclasses. A class may be declared final (§8.1.1.2), in which case it cannot have subclasses. If a class is declared public, then it can be referred to from other packages. Each class except Object is an extension of (that is, a subclass of) a single existing class (§8.1.4) and may implement interfaces (§8.1.5). Classes may be generic, that is, they may declare type variables (§4.4) whose bindings may differ among different instances of the class. Classes may be decorated with annotations (§9.7) just like any other kind of declaration. ...... ...展开收缩
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