ByteUtil (library API)

java.lang.Object
- xyz.facex.library.util.ByteUtil

```
public class ByteUtil
extends Object
```
In Java, it don't support unsigned int, so we use char to replace uint8. The range of byte is [-128,127], and the range of char is [0,65535]. So the byte could used to store the uint8. (We assume that the String could be mapped to assic)

字段概要

字段
限定符和类型字段和说明

static String ESPTOUCH_ENCODING_CHARSET

字段
限定符和类型	字段和说明
`static String`	`ESPTOUCH_ENCODING_CHARSET`

构造器概要

构造器
构造器和说明

ByteUtil()

构造器
构造器和说明
`ByteUtil()`

方法概要

所有方法静态方法具体方法
限定符和类型	方法和说明
`static byte`	`combine2bytesToOne(byte high, byte low)` Combine 2 bytes (high byte and low byte) to one whole byte
`static char`	`combine2bytesToU16(byte high, byte low)` Combine 2 bytes (high byte and low byte) to
`static String`	`convertByte2HexString(byte b)` Convert byte to Hex String
`static char`	`convertByte2Uint8(byte b)` Convert char into uint8( we treat char as uint8 )
`static char[]`	`convertBytes2Uint8s(byte[] bytes)` Convert byte[] into char[]( we treat char[] as uint8[])
`static String`	`convertU8ToHexString(char u8)` Convert char(uint8) to Hex String
`static byte`	`convertUint8toByte(char uint8)` Convert uint8 into char( we treat char as uint8)
`static byte[]`	`genSpecBytes(byte len)` Generate the specific byte to be sent
`static byte[]`	`genSpecBytes(char len)`
`static byte[]`	`getBytesByString(String string)`
`static void`	`main(String[] args)`
`static String`	`parseBssid(byte[] bssidBytes)` parse "24,-2,52,-102,-93,-60" to "18,fe,34,9a,a3,c4" parse the bssid from hex to String
`static String`	`parseBssid(byte[] bssidBytes, int offset, int count)`
`static void`	`putbytes2Uint8s(char[] destUint8s, byte[] srcBytes, int destOffset, int srcOffset, int count)` Put byte[] into char[]( we treat char[] as uint8[])
`static void`	`putString2bytes(byte[] destbytes, String srcString, int destOffset, int srcOffset, int count)` Put String to byte[]
`static byte[]`	`randomBytes(byte len)` Generate the random byte to be sent
`static byte[]`	`randomBytes(char len)` Generate the random byte to be sent
`static byte[]`	`splitUint8To2bytes(char uint8)` Split uint8 to 2 bytes of high byte and low byte. e.g. 20 = 0x14 should be split to [0x01,0x04] 0x01 is high byte and 0x04 is low byte

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - ESPTOUCH_ENCODING_CHARSET
```
public static final String ESPTOUCH_ENCODING_CHARSET
```
    另请参阅:
    
    常量字段值
- 构造器详细资料
  - ByteUtil
```
public ByteUtil()
```
- 方法详细资料
  - putString2bytes
```
public static void putString2bytes(byte[] destbytes,
                                   String srcString,
                                   int destOffset,
                                   int srcOffset,
                                   int count)
```
    Put String to byte[]
    
    参数:
    
    destbytes - the byte[] of dest
    
    srcString - the String of src
    
    destOffset - the offset of byte[]
    
    srcOffset - the offset of String
    
    count - the count of dest, and the count of src as well
  - convertUint8toByte
```
public static byte convertUint8toByte(char uint8)
```
    Convert uint8 into char( we treat char as uint8)
    
    参数:
    
    uint8 - the unit8 to be converted
    
    返回:
    
    the byte of the unint8
  - convertByte2Uint8
```
public static char convertByte2Uint8(byte b)
```
    Convert char into uint8( we treat char as uint8 )
    
    参数:
    
    b - the byte to be converted
    
    返回:
    
    the char(uint8)
  - convertBytes2Uint8s
```
public static char[] convertBytes2Uint8s(byte[] bytes)
```
    Convert byte[] into char[]( we treat char[] as uint8[])
    
    参数:
    
    bytes - the byte[] to be converted
    
    返回:
    
    the char[](uint8[])
  - putbytes2Uint8s
```
public static void putbytes2Uint8s(char[] destUint8s,
                                   byte[] srcBytes,
                                   int destOffset,
                                   int srcOffset,
                                   int count)
```
    Put byte[] into char[]( we treat char[] as uint8[])
    
    参数:
    
    destUint8s - the char[](uint8[]) array
    
    srcBytes - the byte[]
    
    destOffset - the offset of char[](uint8[])
    
    srcOffset - the offset of byte[]
    
    count - the count of dest, and the count of src as well
  - convertByte2HexString
```
public static String convertByte2HexString(byte b)
```
    Convert byte to Hex String
    
    参数:
    
    b - the byte to be converted
    
    返回:
    
    the Hex String
  - convertU8ToHexString
```
public static String convertU8ToHexString(char u8)
```
    Convert char(uint8) to Hex String
    
    参数:
    
    u8 - the char(uint8) to be converted
    
    返回:
    
    the Hex String
  - splitUint8To2bytes
```
public static byte[] splitUint8To2bytes(char uint8)
```
    Split uint8 to 2 bytes of high byte and low byte. e.g. 20 = 0x14 should be split to [0x01,0x04] 0x01 is high byte and 0x04 is low byte
    
    参数:
    
    uint8 - the char(uint8)
    
    返回:
    
    the high and low bytes be split, byte[0] is high and byte[1] is low
  - combine2bytesToOne
```
public static byte combine2bytesToOne(byte high,
                                      byte low)
```
    Combine 2 bytes (high byte and low byte) to one whole byte
    
    参数:
    
    high - the high byte
    
    low - the low byte
    
    返回:
    
    the whole byte
  - combine2bytesToU16
```
public static char combine2bytesToU16(byte high,
                                      byte low)
```
    Combine 2 bytes (high byte and low byte) to
    
    参数:
    
    high - the high byte
    
    low - the low byte
    
    返回:
    
    the char(u8)
  - randomBytes
```
public static byte[] randomBytes(char len)
```
    Generate the random byte to be sent
    
    参数:
    
    len - the len presented by u8
    
    返回:
    
    the byte[] to be sent
  - genSpecBytes
```
public static byte[] genSpecBytes(char len)
```
  - randomBytes
```
public static byte[] randomBytes(byte len)
```
    Generate the random byte to be sent
    
    参数:
    
    len - the len presented by byte
    
    返回:
    
    the byte[] to be sent
  - genSpecBytes
```
public static byte[] genSpecBytes(byte len)
```
    Generate the specific byte to be sent
    
    参数:
    
    len - the len presented by byte
    
    返回:
    
    the byte[]
  - parseBssid
```
public static String parseBssid(byte[] bssidBytes,
                                int offset,
                                int count)
```
  - parseBssid
```
public static String parseBssid(byte[] bssidBytes)
```
    parse "24,-2,52,-102,-93,-60" to "18,fe,34,9a,a3,c4" parse the bssid from hex to String
    
    参数:
    
    bssidBytes - the hex bytes bssid, e.g. {24,-2,52,-102,-93,-60}
    
    返回:
    
    the String of bssid, e.g. 18fe349aa3c4
  - getBytesByString
```
public static byte[] getBytesByString(String string)
```
    参数:
    
    string - the string to be used
    
    返回:
    
    the byte[] of String according to ESPTOUCH_ENCODING_CHARSET
  - main
```
public static void main(String[] args)
```

类 ByteUtil

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

ESPTOUCH_ENCODING_CHARSET

构造器详细资料

ByteUtil

方法详细资料

putString2bytes

convertUint8toByte

convertByte2Uint8

convertBytes2Uint8s

putbytes2Uint8s

convertByte2HexString

convertU8ToHexString

splitUint8To2bytes

combine2bytesToOne

combine2bytesToU16

randomBytes

genSpecBytes

randomBytes

genSpecBytes

parseBssid

parseBssid

getBytesByString

main