How many bytes does the char type occupy?

In Java, the char type occupies 2 bytes; reason: The Java compiler uses Unicode encoding by default, so 2 bytes (16 bits) can represent all characters. In Java, short and char occupy 2 bytes; byte and boolean occupy 1 byte, and int and float occupy 4 bytes.

The operating environment of this tutorial: windows7 system, java10 version, DELL G3 computer.

Number of bytes occupied by Java basic types:

• 1 Bytes: byte, boolean

• 2 bytes: short, char

• 4 bytes: int, float

• 8 bytes: long, double

Note: 1 byte (byte) = 8 bits (bits)

Appendix:

1. Encoding and Chinese:

• Unicode/GBK: Chinese 2 bytes

• UTF-8: Chinese is usually 3 bytes, and the one after the extended B area is 4 characters Section

To sum up, the number of bytes occupied by Chinese characters in encoding is generally 2-4 bytes.

Test code:

/* System.out.println("中".getBytes("UTF-8").length); ----> 6 System.out.println("中中".getBytes("UTF-8").length); ----> 9 System.out.println("中".getBytes("GBK").length); ----> 3 System.out.println("中中".getBytes("GBK").length); ----> 6 不好意思，我也不能解释，为什么打印的结果是这样的。大牛飘过还请指摘。 */

2. Number of bytes of char in Java:

Char occupies 2 bytes in Java.

The Java compiler uses Unicode encoding by default, so 2 bytes can represent all characters.

Test code:

char a= (char) Integer.MAX_VALUE; System.out.println((int)a);

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