Java Unicode编码 [英] Java Unicode encoding

问题描述

Java char 是 2个字节（最大大小为65,536），但有 95,221 Unicode字符。这是否意味着您不能处理Java应用程序中的某些Unicode字符？

A Java char is 2 bytes (max size of 65,536) but there are 95,221 Unicode characters. Does this mean that you can't handle certain Unicode characters in a Java application?

这是否归结为你使用什么字符编码？

Does this boil down to what character encoding you are using?

推荐答案

Java的 char 是一个 UTF-16代码单元。对于代码点> 0xFFFF的字符，将编码为2 char s（代理对）。

Java's char is a UTF-16 code unit. For characters with code-point > 0xFFFF it will be encoded with 2 chars (a surrogate pair).

请参见 http://www.oracle.com/us/technologies/java /supplementary-142654.html ，了解如何处理Java中的这些字符。

See http://www.oracle.com/us/technologies/java/supplementary-142654.html for how to handle those characters in Java.

（BTW，在Unicode 5.2中，有1,114,112个插槽中有107,154个字符。 ）

(BTW, in Unicode 5.2 there are 107,154 assigned characters out of 1,114,112 slots.)

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