Java基础名词

最新推荐文章于 2025-03-09 21:41:31 发布

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最新推荐文章于 2025-03-09 21:41:31 发布

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分类专栏：简单实现文章标签： java

原文链接：https://docs.oracle.com/javase/tutorial/information/glossary.html

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本文详细解释了Java中类的各种成员，包括变量（类变量、实例变量、局部变量）、方法及构造器的概念和用法，帮助读者更好地理解Java类的构成。

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member

A field or method of a class. Unless specified otherwise, a member is not static.
一个类由域和方法构成。

variable

An item of data named by an identifier. Each variable has a type, such as int or Object, and a scope. See also class variable, instance variable, local variable.
一共有三种变量：类变量、实例变量和局部变量。

class variable = static field

A data item associated with a particular class as a whole–not with particular instances of the class. Class variables are defined in class definitions. Also called a static field. See also instance variable.
与类本身在一起，而非类创建的实例。

instance variable = field

Any item of data that is associated with a particular object. Each instance of a class has its own copy of the instance variables defined in the class. Also called a field. See also class variable.
field
A data member of a class. Unless specified otherwise, a field is not static.
由类创建出的实例的变量，与实例在一起。

local variable

A data item known within a block, but inaccessible to code outside the block. For example, any variable defined within a method is a local variable and can’t be used outside the method.
方法里创建的变量。还有循环体。

constructor

A pseudo-method that creates an object. In the Java™ programming language, constructors are instance methods with the same name as their class. Constructors are invoked using the new keyword.
与类同名的实例伪方法。