Java bit, byte, bit, byte, kanji, character

Package Test;public class Bytetest {    /**      * Byte 8 bits-128-+ 127      * 1 bit = 12 binary data      * 1 byte = 8 bit
   
    * 1 letter = 1 byte = 8 bit (bit)      * 1 kanji = 2 byte = three bit      */public  static void Main (string[] args) {        //TODO A uto-generated method Stub          Byte B1 = 127;          byte b2 = -128;          byte B3 = ' a ';          byte b4 = ' A '; One letter = 1 byte = 8 bit  //      byte B5 = ' AA ';  This is wrong  //      byte B6 = ' Medium '; it's a mistake. 2 bytes 16bit short          s1 = ' ah ';//A Chinese character 2 bytes 16bit Short is a bit of  //
    
     short s2 = ' kanji ';  2 Kanji 4 bytes The three-bit int is the  //      int i1 = ' kanji ';  But int is a numeric type, char is a = 2 byte = a kanji          char c1 = ' Khan ';      byte converts a string string string          = "Chinese";          byte by[] = String.getbytes ();          for (byte b:by) {System.out.println (b);}        String str = new string (by);          System.out.println ("str=" +str); }}
    
   

　

The relationship between bit, byte, bit, byte and Chinese characters


1 bit = 12 binary data
1 byte = 8 bit
1 letter = 1 byte = 8 bit
1 Kanji = 2 byte = + bit


1. Bit: Bits
One binary data 0 or 1, is 1bit;

2. Byte: Byte
The basic unit of measurement for storage space, such as: the definition of VARCHAR (45) in MySQL means 45 bytes;
1 byte = 8 bit

3. A single byte of an English character;
1 letter = 1 byte = 8 bit

4. A kanji account of 2 bytes;
1 Kanji = 2 byte = + bit

5. Punctuation
A>. The input state of Chinese characters, the default is full-width input mode;
B>. In the English input state, the default is the half-width input mode;

C>. In full-width input mode, punctuation is 2 bytes;
D>. In the half-angle input mode, punctuation marks account for 1 bytes;

Therefore: characters in the input state of the characters, accounting for 2 bytes (but do not exclude, they changed the default settings);
The characters in the English input state, accounting for 1 bytes (but do not exclude, they changed the default settings);

　

Java bit, byte, bit, byte, kanji, character