In java, char occupies 2 bytes. In Java, as long as it is a character, whether it is a number, English or Chinese character, it takes up two bytes. Reason: Java compiler uses Unicode encoding by default, so 2 bytes can represent all characters.
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1: "Byte" is byte, "Bit" is bit;
2: 1 byte = 8 bit;
char is 2 bytes in java. Java uses Unicode, 2 bytes (16 bits) to represent a character.
The example code is as follows:
public class Test { public static void main(String[] args) { String str= "中"; char x ='中'; byte[] bytes=null; byte[] bytes1=null; try { bytes = str.getBytes("utf-8"); bytes1 = charToByte(x); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println("bytes 大小："+bytes.length); System.out.println("bytes1大小："+bytes1.length); } public static byte[] charToByte(char c) { byte[] b = new byte[2]; b[0] = (byte) ((c & 0xFF00) >> 8); b[1] = (byte) (c & 0xFF); return b; } }
Running result:
bytes 大小：3 bytes1大小：2
Java uses unicode to represent characters. The unicode of the Chinese character "中" is 2 bytes.
The String.getBytes(encoding) method is to obtain the byte array representation of the specified encoding.
Usually gbk/gb2312 is 2 bytes and utf-8 is 3 bytes.
If encoding is not specified, the system default encoding will be used.
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