java中的常量变量和最终变量有什么区别?

What is the difference between constant variables and final variables in java?(java中的常量变量和最终变量有什么区别?)

问题描述

请帮助我理解 Java 中常量变量和 final 变量之间的区别.我有点困惑.

Please help me understand the difference between constant variables and final variables in Java. I am a bit confused with it.

推荐答案

Constant是概念，是变量的属性.

Constant is the concept, the property of the variable.

final 是声明常量变量的java关键字.

final is the java keyword to declare a constant variable.

正如其他人指出的那样，从语义/语言的角度来看，表达式 constant variable 是矛盾的，因此，我们可以争论它的正确性.

As other people pointed out, from a semantic/linguistic point of view the expression constant variable is an oxymoron and, as such, we could argue about its correctness.

引用规范，无论如何，我们可以阅读

Quoting the specification, anyway, we can read

原始类型的变量 [...] 是 final 并使用编译时常量表达式(第 15.28 节)进行初始化，称为常量变量.

A variable of primitive type [...], that is final and initialized with a compile-time constant expression (§15.28), is called a constant variable.

因此，我想我们可以接受(并认为是正确的)这个二项式来达到我们的目的.

I suppose, hence, that we can accept (and consider correct) this binomial for our purpose.

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