java - java中原始类型char的值指的是哪个Unicode表？

Question

想在java中查找原始类型char的值的编码表，听说java内部使用Unicode。 java中原始类型char的值指的是哪个Unicode表？

Answer 1

如 the Oracle documentation 中所述:

When the specification for the Java language was created, the Unicodestandard was accepted and the char primitive was defined as a 16-bitdata type, with characters in the hexadecimal range from 0x0000 to0xFFFF.

Because 16-bit encoding supports 216 (65,536) characters, which is insufficient to define all characters in use throughout the world,the Unicode standard was extended to 0x10FFFF, which supports over onemillion characters. The definition of a character in the Javaprogramming language could not be changed from 16 bits to 32 bitswithout causing millions of Java applications to no longer runproperly. To correct the definition, a scheme was developed to handlecharacters that could not be encoded in 16 bits.

The characters with values that are outside of the 16-bit range, and within the range from 0x10000 to 0x10FFFF, are calledsupplementary characters and are defined as a pair of char values.

查看unicode字符表here .