How many bytes of Chinese characters in java

java How many bytes of Chinese characters

In java, as long as it is a character, whether it is a number or English or Chinese characters both occupy 2 bytes and are both one char.

char c1 = '中'; 
char c2 = 'A'; 
char c3 = '1';

To be precise, Unicode encoding refers to a general term for a type of encoding, rather than a specific encoding. UTF-8 is different from Unicode.

Take utf8 as an example. utf8 is a variable-length encoding standard that can represent a character in 1 to 4 bytes, while Chinese occupies 3 bytes and ascii characters occupies 1 byte.

Because java uses unicode as the encoding method. Unicode is a fixed-length encoding standard. Each character is 2 bytes, which is 1 char type space.

Extended knowledge:

Unicode is an encoding scheme. Unicode was created to solve the limitations of traditional character encoding schemes. It provides universal encoding for every character in every language. A unified and unique binary encoding is set for each character to meet the requirements for cross-language and cross-platform text conversion and processing. There are three specific implementations of Unicode encoding, namely utf-8, utf-16, and utf-32. Among them, utf-8 occupies one to four bytes, utf-16 occupies two or four bytes, and utf-32 occupies four bytes. bytes. Currently, Unicode codes are widely used in the field of information exchange around the world.

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