Example code for parsing how many bytes char occupies in java

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The analysis of how many bytes char occupies in java.

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;  
  } 
}

Run result:

bytes Size: 3bytes1 size ：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, UTF-8 is 3 bytes.

If encoding is not specified, the system default encoding will be used.

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