What does char mean in java

char in Java represents a primitive data type that stores a single Unicode character, using two bytes, ranging from 0x0000 to 0xFFFF, and the default value is '\u0000'. It is used to store individual characters or as part of a string.

What does char mean in Java?

char is a primitive data type in Java used to store single Unicode characters. It uses two bytes to represent a character, allowing all Unicode code points to be stored, from 0x0000 to 0xFFFF.

Data type of char

• Size: 2 bytes
• Range: 0x0000 to 0xFFFF
• Default value: '\u0000' (null character)

Usage of char

The char type is mainly used in the following situations:

• stores a single character, such as: 'a', 'B'
• represents Unicode characters, for example: '\u03B1' (Greek letter α)
• as a component of a string (String)

char type and String type

• char stores a single character, while String stores a sequence of characters.
• char is a primitive data type and takes up less memory, while String is an object and takes up more memory.
• char can be created by using single quotes, while String is created by using double quotes.

Example

char myChar = 'a';  // 存储字符'a'

char greekChar = '\u03B1';  // 存储希腊字母α

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