检索字符的 Unicode 值：Java
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Retrieving the Unicode value of char: Java
提问by HasKal
I am looking for a way to retrieve the Unicode value for a given char, and if possible store it as an integer. Any inbuilt method for this in Java, or do I have to code my own?
我正在寻找一种方法来检索给定字符的 Unicode 值，并在可能的情况下将其存储为整数。Java 中的任何内置方法，还是我必须自己编写代码？
Context
语境
I am building a basic encryption program for fun. What I need is to map each character in the Unicode set to an integer, which I can then manipulate in my encryption formula.
为了好玩，我正在构建一个基本的加密程序。我需要的是将 Unicode 集中的每个字符映射到一个整数，然后我可以在我的加密公式中对其进行操作。
I thought about using ASCII values for char by typecasting the char as an int, but then I read about Unicode online, and realised my mistake.
我想通过将 char 类型转换为 int 来使用 char 的 ASCII 值，但后来我在网上阅读了 Unicode，并意识到了我的错误。
Any help will be appreciated.
任何帮助将不胜感激。
回答by NINCOMPOOP
The Java programming language represents text in sequences of 16-bit code units, using the UTF-16 encoding.
Java 编程语言使用 UTF-16 编码以 16 位代码单元的序列表示文本。
Hence this is enough :
因此，这就足够了：
char character='a';
int code = character;
System.out.println(code);
As per JLS 3.10.4
Character literals can only represent UTF-16 code units (§3.1), i.e., they are limited to values from \u0000 to \uffff. Supplementary characters must be represented either as a surrogate pair within a char sequence, or as an integer, depending on the API they are used with.
字符字面量只能表示 UTF-16 代码单元（第 3.1 节），即它们仅限于从 \u0000 到 \uffff 的值。补充字符必须表示为字符序列中的代理对或整数，具体取决于它们所使用的 API。
