How many bytes are char in java?

1 byte = 8 bit;

char is 2 bytes in Java. Java uses Unicode, 2 bytes (16 bits) to represent a character. (Recommended learning: java course )

A number or English or Chinese character is a character, except that in the number and English The first byte is all 0, which is a waste of space.

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

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