AsciiString (Netty 4.1.109.Final API文档 - 即时通讯网(52im.net))

java.lang.Object
- io.netty.util.AsciiString

所有已实现的接口:

java.lang.CharSequence, java.lang.Comparable<java.lang.CharSequence>
```
public final class AsciiString
extends java.lang.Object
implements java.lang.CharSequence, java.lang.Comparable<java.lang.CharSequence>
```
A string which has been encoded into a character encoding whose character always takes a single byte, similarly to ASCII. It internally keeps its content in a byte array unlike String, which uses a character array, for reduced memory footprint and faster data transfer from/to byte-based data structures such as a byte array and ByteBuffer. It is often used in conjunction with Headers that require a CharSequence.
This class was designed to provide an immutable array of bytes, and caches some internal state based upon the value of this array. However underlying access to this byte array is provided via not copying the array on construction or array(). If any changes are made to the underlying byte array it is the user's responsibility to call arrayChanged() so the state of this class can be reset.

字段概要

字段
限定符和类型	字段和说明
`static HashingStrategy<java.lang.CharSequence>`	`CASE_INSENSITIVE_HASHER`
`static HashingStrategy<java.lang.CharSequence>`	`CASE_SENSITIVE_HASHER`
`static AsciiString`	`EMPTY_STRING`
`static int`	`INDEX_NOT_FOUND`

构造器概要

构造器
构造器和说明
`AsciiString(byte[] value)` Initialize this byte string based upon a byte array.
`AsciiString(byte[] value, boolean copy)` Initialize this byte string based upon a byte array.
`AsciiString(byte[] value, int start, int length, boolean copy)` Construct a new instance from a `byte[]` array.
`AsciiString(java.nio.ByteBuffer value)` Create a copy of the underlying storage from `value`.
`AsciiString(java.nio.ByteBuffer value, boolean copy)` Initialize an instance based upon the underlying storage from `value`.
`AsciiString(java.nio.ByteBuffer value, int start, int length, boolean copy)` Initialize an `AsciiString` based upon the underlying storage from `value`.
`AsciiString(char[] value)` Create a copy of `value` into this instance assuming ASCII encoding.
`AsciiString(char[] value, java.nio.charset.Charset charset)` Create a copy of `value` into this instance using the encoding type of `charset`.
`AsciiString(char[] value, java.nio.charset.Charset charset, int start, int length)` Create a copy of `value` into a this instance using the encoding type of `charset`.
`AsciiString(char[] value, int start, int length)` Create a copy of `value` into this instance assuming ASCII encoding.
`AsciiString(java.lang.CharSequence value)` Create a copy of `value` into this instance assuming ASCII encoding.
`AsciiString(java.lang.CharSequence value, java.nio.charset.Charset charset)` Create a copy of `value` into this instance using the encoding type of `charset`.
`AsciiString(java.lang.CharSequence value, java.nio.charset.Charset charset, int start, int length)` Create a copy of `value` into this instance using the encoding type of `charset`.
`AsciiString(java.lang.CharSequence value, int start, int length)` Create a copy of `value` into this instance assuming ASCII encoding.

方法概要

All Methods Static Methods Instance Methods Concrete Methods
限定符和类型	方法和说明
`byte[]`	`array()` This gives direct access to the underlying storage array.
`void`	`arrayChanged()` During normal use cases the `AsciiString` should be immutable, but if the underlying array is shared, and changes then this needs to be called.
`int`	`arrayOffset()` The offset into `array()` for which data for this ByteString begins.
`static char`	`b2c(byte b)`
`byte`	`byteAt(int index)`
`static byte`	`c2b(char c)`
`static AsciiString`	`cached(java.lang.String string)` Returns an `AsciiString` containing the given string and retains/caches the input string for later use in `toString()`.
`char`	`charAt(int index)`
`int`	`compareTo(java.lang.CharSequence string)` Compares the specified string to this string using the ASCII values of the characters.
`AsciiString`	`concat(java.lang.CharSequence string)` Concatenates this string and the specified string.
`boolean`	`contains(java.lang.CharSequence cs)` Determines if this `String` contains the sequence of characters in the `CharSequence` passed.
`static boolean`	`contains(java.lang.CharSequence a, java.lang.CharSequence b)` Determine if `a` contains `b` in a case sensitive manner.
`static boolean`	`containsAllContentEqualsIgnoreCase(java.util.Collection<java.lang.CharSequence> a, java.util.Collection<java.lang.CharSequence> b)` Determine if `a` contains all of the values in `b` using `contentEqualsIgnoreCase(CharSequence, CharSequence)` to compare values.
`static boolean`	`containsContentEqualsIgnoreCase(java.util.Collection<java.lang.CharSequence> collection, java.lang.CharSequence value)` Determine if `collection` contains `value` and using `contentEqualsIgnoreCase(CharSequence, CharSequence)` to compare values.
`static boolean`	`containsIgnoreCase(java.lang.CharSequence a, java.lang.CharSequence b)` Determine if `a` contains `b` in a case insensitive manner.
`boolean`	`contentEquals(java.lang.CharSequence a)` Compares a `CharSequence` to this `String` to determine if their contents are equal.
`static boolean`	`contentEquals(java.lang.CharSequence a, java.lang.CharSequence b)` Returns `true` if the content of both `CharSequence`'s are equals.
`boolean`	`contentEqualsIgnoreCase(java.lang.CharSequence string)` Compares the specified string to this string ignoring the case of the characters and returns true if they are equal.
`static boolean`	`contentEqualsIgnoreCase(java.lang.CharSequence a, java.lang.CharSequence b)` Returns `true` if both `CharSequence`'s are equals when ignore the case.
`void`	`copy(int srcIdx, byte[] dst, int dstIdx, int length)` Copies the content of this string to a byte array.
`void`	`copy(int srcIdx, char[] dst, int dstIdx, int length)` Copied the content of this string to a character array.
`boolean`	`endsWith(java.lang.CharSequence suffix)` Compares the specified string to this string to determine if the specified string is a suffix.
`boolean`	`equals(java.lang.Object obj)`
`int`	`forEachByte(ByteProcessor visitor)` Iterates over the readable bytes of this buffer with the specified `processor` in ascending order.
`int`	`forEachByte(int index, int length, ByteProcessor visitor)` Iterates over the specified area of this buffer with the specified `processor` in ascending order.
`int`	`forEachByteDesc(ByteProcessor visitor)` Iterates over the readable bytes of this buffer with the specified `processor` in descending order.
`int`	`forEachByteDesc(int index, int length, ByteProcessor visitor)` Iterates over the specified area of this buffer with the specified `processor` in descending order.
`int`	`hashCode()` Provides a case-insensitive hash code for Ascii like byte strings.
`static int`	`hashCode(java.lang.CharSequence value)` Returns the case-insensitive hash code of the specified string.
`int`	`indexOf(char ch, int start)` Searches in this string for the index of the specified char `ch`.
`int`	`indexOf(java.lang.CharSequence string)` Searches in this string for the first index of the specified string.
`static int`	`indexOf(java.lang.CharSequence cs, char searchChar, int start)` Finds the first index in the `CharSequence` that matches the specified character.
`int`	`indexOf(java.lang.CharSequence subString, int start)` Searches in this string for the index of the specified string.
`static int`	`indexOfIgnoreCase(java.lang.CharSequence str, java.lang.CharSequence searchStr, int startPos)` Case in-sensitive find of the first index within a CharSequence from the specified position.
`static int`	`indexOfIgnoreCaseAscii(java.lang.CharSequence str, java.lang.CharSequence searchStr, int startPos)` Case in-sensitive find of the first index within a CharSequence from the specified position.
`boolean`	`isEmpty()` Determine if this instance has 0 length.
`boolean`	`isEntireArrayUsed()` Determine if the storage represented by `array()` is entirely used.
`static boolean`	`isUpperCase(byte value)`
`static boolean`	`isUpperCase(char value)`
`int`	`lastIndexOf(java.lang.CharSequence string)` Searches in this string for the last index of the specified string.
`int`	`lastIndexOf(java.lang.CharSequence subString, int start)` Searches in this string for the index of the specified string.
`int`	`length()` The length in bytes of this instance.
`boolean`	`matches(java.lang.String expr)` Determines whether this string matches a given regular expression.
`static AsciiString`	`of(java.lang.CharSequence string)` Returns an `AsciiString` containing the given character sequence.
`boolean`	`parseBoolean()`
`char`	`parseChar()`
`char`	`parseChar(int start)`
`double`	`parseDouble()`
`double`	`parseDouble(int start, int end)`
`float`	`parseFloat()`
`float`	`parseFloat(int start, int end)`
`int`	`parseInt()`
`int`	`parseInt(int radix)`
`int`	`parseInt(int start, int end)`
`int`	`parseInt(int start, int end, int radix)`
`long`	`parseLong()`
`long`	`parseLong(int radix)`
`long`	`parseLong(int start, int end)`
`long`	`parseLong(int start, int end, int radix)`
`short`	`parseShort()`
`short`	`parseShort(int radix)`
`short`	`parseShort(int start, int end)`
`short`	`parseShort(int start, int end, int radix)`
`boolean`	`regionMatches(boolean ignoreCase, int thisStart, java.lang.CharSequence string, int start, int length)` Compares the specified string to this string and compares the specified range of characters to determine if they are the same.
`static boolean`	`regionMatches(java.lang.CharSequence cs, boolean ignoreCase, int csStart, java.lang.CharSequence string, int start, int length)` This methods make regionMatches operation correctly for any chars in strings
`boolean`	`regionMatches(int thisStart, java.lang.CharSequence string, int start, int length)` Compares the specified string to this string and compares the specified range of characters to determine if they are the same.
`static boolean`	`regionMatchesAscii(java.lang.CharSequence cs, boolean ignoreCase, int csStart, java.lang.CharSequence string, int start, int length)` This is optimized version of regionMatches for string with ASCII chars only
`AsciiString`	`replace(char oldChar, char newChar)` Copies this string replacing occurrences of the specified character with another character.
`AsciiString[]`	`split(char delim)` Splits the specified `String` with the specified delimiter..
`AsciiString[]`	`split(java.lang.String expr, int max)` Splits this string using the supplied regular expression `expr`.
`boolean`	`startsWith(java.lang.CharSequence prefix)` Compares the specified string to this string to determine if the specified string is a prefix.
`boolean`	`startsWith(java.lang.CharSequence prefix, int start)` Compares the specified string to this string, starting at the specified offset, to determine if the specified string is a prefix.
`AsciiString`	`subSequence(int start)` Copies a range of characters into a new string.
`AsciiString`	`subSequence(int start, int end)` Copies a range of characters into a new string.
`AsciiString`	`subSequence(int start, int end, boolean copy)` Either copy or share a subset of underlying sub-sequence of bytes.
`byte[]`	`toByteArray()` Converts this string to a byte array.
`byte[]`	`toByteArray(int start, int end)` Converts a subset of this string to a byte array.
`char[]`	`toCharArray()` Copies the characters in this string to a character array.
`char[]`	`toCharArray(int start, int end)` Copies the characters in this string to a character array.
`AsciiString`	`toLowerCase()` Converts the characters in this string to lowercase, using the default Locale.
`static char`	`toLowerCase(char c)` If the character is uppercase - converts the character to lowercase, otherwise returns the character as it is.
`java.lang.String`	`toString()` Translates the entire byte string to a `String`.
`java.lang.String`	`toString(int start)` Translates the entire byte string to a `String` using the `charset` encoding.
`java.lang.String`	`toString(int start, int end)` Translates the [`start`, `end`) range of this byte string to a `String`.
`AsciiString`	`toUpperCase()` Converts the characters in this string to uppercase, using the default Locale.
`AsciiString`	`trim()` Duplicates this string removing white space characters from the beginning and end of the string, without copying.
`static java.lang.CharSequence`	`trim(java.lang.CharSequence c)` Copies this string removing white space characters from the beginning and end of the string, and tries not to copy if possible.

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

从接口继承的方法 java.lang.CharSequence
chars, codePoints

- 字段详细资料
  - EMPTY_STRING
```
public static final AsciiString EMPTY_STRING
```
  - INDEX_NOT_FOUND
```
public static final int INDEX_NOT_FOUND
```
    另请参阅:
    
    常量字段值
  - CASE_INSENSITIVE_HASHER
```
public static final HashingStrategy<java.lang.CharSequence> CASE_INSENSITIVE_HASHER
```
  - CASE_SENSITIVE_HASHER
```
public static final HashingStrategy<java.lang.CharSequence> CASE_SENSITIVE_HASHER
```
- 构造器详细资料
  - AsciiString
```
public AsciiString(byte[] value)
```
    Initialize this byte string based upon a byte array. A copy will be made.
  - AsciiString
```
public AsciiString(byte[] value,
                   boolean copy)
```
    Initialize this byte string based upon a byte array. copy determines if a copy is made or the array is shared.
  - AsciiString
```
public AsciiString(byte[] value,
                   int start,
                   int length,
                   boolean copy)
```
    Construct a new instance from a byte[] array.
    
    参数:
    
    copy - true then a copy of the memory will be made. false the underlying memory will be shared.
  - AsciiString
```
public AsciiString(java.nio.ByteBuffer value)
```
    Create a copy of the underlying storage from value. The copy will start at Buffer.position() and copy Buffer.remaining() bytes.
  - AsciiString
```
public AsciiString(java.nio.ByteBuffer value,
                   boolean copy)
```
    Initialize an instance based upon the underlying storage from value. There is a potential to share the underlying array storage if ByteBuffer.hasArray() is true. if copy is true a copy will be made of the memory. if copy is false the underlying storage will be shared, if possible.
  - AsciiString
```
public AsciiString(java.nio.ByteBuffer value,
                   int start,
                   int length,
                   boolean copy)
```
    Initialize an AsciiString based upon the underlying storage from value. There is a potential to share the underlying array storage if ByteBuffer.hasArray() is true. if copy is true a copy will be made of the memory. if copy is false the underlying storage will be shared, if possible.
  - AsciiString
```
public AsciiString(char[] value)
```
    Create a copy of value into this instance assuming ASCII encoding.
  - AsciiString
```
public AsciiString(char[] value,
                   int start,
                   int length)
```
    Create a copy of value into this instance assuming ASCII encoding. The copy will start at index start and copy length bytes.
  - AsciiString
```
public AsciiString(char[] value,
                   java.nio.charset.Charset charset)
```
    Create a copy of value into this instance using the encoding type of charset.
  - AsciiString
```
public AsciiString(char[] value,
                   java.nio.charset.Charset charset,
                   int start,
                   int length)
```
    Create a copy of value into a this instance using the encoding type of charset. The copy will start at index start and copy length bytes.
  - AsciiString
```
public AsciiString(java.lang.CharSequence value)
```
    Create a copy of value into this instance assuming ASCII encoding.
  - AsciiString
```
public AsciiString(java.lang.CharSequence value,
                   int start,
                   int length)
```
    Create a copy of value into this instance assuming ASCII encoding. The copy will start at index start and copy length bytes.
  - AsciiString
```
public AsciiString(java.lang.CharSequence value,
                   java.nio.charset.Charset charset)
```
    Create a copy of value into this instance using the encoding type of charset.
  - AsciiString
```
public AsciiString(java.lang.CharSequence value,
                   java.nio.charset.Charset charset,
                   int start,
                   int length)
```
    Create a copy of value into this instance using the encoding type of charset. The copy will start at index start and copy length bytes.
- 方法详细资料
  - forEachByte
```
public int forEachByte(ByteProcessor visitor)
                throws java.lang.Exception
```
    Iterates over the readable bytes of this buffer with the specified processor in ascending order.
    
    返回:
    
    -1 if the processor iterated to or beyond the end of the readable bytes. The last-visited index If the ByteProcessor.process(byte) returned false.
    
    抛出:
    
    java.lang.Exception
  - forEachByte
```
public int forEachByte(int index,
                       int length,
                       ByteProcessor visitor)
                throws java.lang.Exception
```
    Iterates over the specified area of this buffer with the specified processor in ascending order. (i.e. index, (index + 1), .. (index + length - 1)).
    
    返回:
    
    -1 if the processor iterated to or beyond the end of the specified area. The last-visited index If the ByteProcessor.process(byte) returned false.
    
    抛出:
    
    java.lang.Exception
  - forEachByteDesc
```
public int forEachByteDesc(ByteProcessor visitor)
                    throws java.lang.Exception
```
    Iterates over the readable bytes of this buffer with the specified processor in descending order.
    
    返回:
    
    -1 if the processor iterated to or beyond the beginning of the readable bytes. The last-visited index If the ByteProcessor.process(byte) returned false.
    
    抛出:
    
    java.lang.Exception
  - forEachByteDesc
```
public int forEachByteDesc(int index,
                           int length,
                           ByteProcessor visitor)
                    throws java.lang.Exception
```
    Iterates over the specified area of this buffer with the specified processor in descending order. (i.e. (index + length - 1), (index + length - 2), ... index).
    
    返回:
    
    -1 if the processor iterated to or beyond the beginning of the specified area. The last-visited index If the ByteProcessor.process(byte) returned false.
    
    抛出:
    
    java.lang.Exception
  - byteAt
```
public byte byteAt(int index)
```
  - isEmpty
```
public boolean isEmpty()
```
    Determine if this instance has 0 length.
  - length
```
public int length()
```
    The length in bytes of this instance.
    
    指定者:
    
    length 在接口中 java.lang.CharSequence
  - arrayChanged
```
public void arrayChanged()
```
    During normal use cases the AsciiString should be immutable, but if the underlying array is shared, and changes then this needs to be called.
  - array
```
public byte[] array()
```
    This gives direct access to the underlying storage array. The toByteArray() should be preferred over this method. If the return value is changed then arrayChanged() must be called.
    
    另请参阅:
    
    arrayOffset(), isEntireArrayUsed()
  - arrayOffset
```
public int arrayOffset()
```
    The offset into array() for which data for this ByteString begins.
    
    另请参阅:
    
    array(), isEntireArrayUsed()
  - isEntireArrayUsed
```
public boolean isEntireArrayUsed()
```
    Determine if the storage represented by array() is entirely used.
    
    另请参阅:
    
    array()
  - toByteArray
```
public byte[] toByteArray()
```
    Converts this string to a byte array.
  - toByteArray
```
public byte[] toByteArray(int start,
                          int end)
```
    Converts a subset of this string to a byte array. The subset is defined by the range [start, end).
  - copy
```
public void copy(int srcIdx,
                 byte[] dst,
                 int dstIdx,
                 int length)
```
    Copies the content of this string to a byte array.
    
    参数:
    
    srcIdx - the starting offset of characters to copy.
    
    dst - the destination byte array.
    
    dstIdx - the starting offset in the destination byte array.
    
    length - the number of characters to copy.
  - charAt
```
public char charAt(int index)
```
    指定者:
    
    charAt 在接口中 java.lang.CharSequence
  - contains
```
public boolean contains(java.lang.CharSequence cs)
```
    Determines if this String contains the sequence of characters in the CharSequence passed.
    
    参数:
    
    cs - the character sequence to search for.
    
    返回:
    
    true if the sequence of characters are contained in this string, otherwise false.
  - compareTo
```
public int compareTo(java.lang.CharSequence string)
```
    Compares the specified string to this string using the ASCII values of the characters. Returns 0 if the strings contain the same characters in the same order. Returns a negative integer if the first non-equal character in this string has an ASCII value which is less than the ASCII value of the character at the same position in the specified string, or if this string is a prefix of the specified string. Returns a positive integer if the first non-equal character in this string has a ASCII value which is greater than the ASCII value of the character at the same position in the specified string, or if the specified string is a prefix of this string.
    
    指定者:
    
    compareTo 在接口中 java.lang.Comparable<java.lang.CharSequence>
    
    参数:
    
    string - the string to compare.
    
    返回:
    
    0 if the strings are equal, a negative integer if this string is before the specified string, or a positive integer if this string is after the specified string.
    
    抛出:
    
    java.lang.NullPointerException - if string is null.
  - concat
```
public AsciiString concat(java.lang.CharSequence string)
```
    Concatenates this string and the specified string.
    
    参数:
    
    string - the string to concatenate
    
    返回:
    
    a new string which is the concatenation of this string and the specified string.
  - endsWith
```
public boolean endsWith(java.lang.CharSequence suffix)
```
    Compares the specified string to this string to determine if the specified string is a suffix.
    
    参数:
    
    suffix - the suffix to look for.
    
    返回:
    
    true if the specified string is a suffix of this string, false otherwise.
    
    抛出:
    
    java.lang.NullPointerException - if suffix is null.
  - contentEqualsIgnoreCase
```
public boolean contentEqualsIgnoreCase(java.lang.CharSequence string)
```
    Compares the specified string to this string ignoring the case of the characters and returns true if they are equal.
    
    参数:
    
    string - the string to compare.
    
    返回:
    
    true if the specified string is equal to this string, false otherwise.
  - toCharArray
```
public char[] toCharArray()
```
    Copies the characters in this string to a character array.
    
    返回:
    
    a character array containing the characters of this string.
  - toCharArray
```
public char[] toCharArray(int start,
                          int end)
```
    Copies the characters in this string to a character array.
    
    返回:
    
    a character array containing the characters of this string.
  - copy
```
public void copy(int srcIdx,
                 char[] dst,
                 int dstIdx,
                 int length)
```
    Copied the content of this string to a character array.
    
    参数:
    
    srcIdx - the starting offset of characters to copy.
    
    dst - the destination character array.
    
    dstIdx - the starting offset in the destination byte array.
    
    length - the number of characters to copy.
  - subSequence
```
public AsciiString subSequence(int start)
```
    Copies a range of characters into a new string.
    
    参数:
    
    start - the offset of the first character (inclusive).
    
    返回:
    
    a new string containing the characters from start to the end of the string.
    
    抛出:
    
    java.lang.IndexOutOfBoundsException - if start < 0 or start > length().
  - subSequence
```
public AsciiString subSequence(int start,
                               int end)
```
    Copies a range of characters into a new string.
    
    指定者:
    
    subSequence 在接口中 java.lang.CharSequence
    
    参数:
    
    start - the offset of the first character (inclusive).
    
    end - The index to stop at (exclusive).
    
    返回:
    
    a new string containing the characters from start to the end of the string.
    
    抛出:
    
    java.lang.IndexOutOfBoundsException - if start < 0 or start > length().
  - subSequence
```
public AsciiString subSequence(int start,
                               int end,
                               boolean copy)
```
    Either copy or share a subset of underlying sub-sequence of bytes.
    
    参数:
    
    start - the offset of the first character (inclusive).
    
    end - The index to stop at (exclusive).
    
    copy - If true then a copy of the underlying storage will be made. If false then the underlying storage will be shared.
    
    返回:
    
    a new string containing the characters from start to the end of the string.
    
    抛出:
    
    java.lang.IndexOutOfBoundsException - if start < 0 or start > length().
  - indexOf
```
public int indexOf(java.lang.CharSequence string)
```
    Searches in this string for the first index of the specified string. The search for the string starts at the beginning and moves towards the end of this string.
    
    参数:
    
    string - the string to find.
    
    返回:
    
    the index of the first character of the specified string in this string, -1 if the specified string is not a substring.
    
    抛出:
    
    java.lang.NullPointerException - if string is null.
  - indexOf
```
public int indexOf(java.lang.CharSequence subString,
                   int start)
```
    Searches in this string for the index of the specified string. The search for the string starts at the specified offset and moves towards the end of this string.
    
    参数:
    
    subString - the string to find.
    
    start - the starting offset.
    
    返回:
    
    the index of the first character of the specified string in this string, -1 if the specified string is not a substring.
    
    抛出:
    
    java.lang.NullPointerException - if subString is null.
  - indexOf
```
public int indexOf(char ch,
                   int start)
```
    Searches in this string for the index of the specified char ch. The search for the char starts at the specified offset start and moves towards the end of this string.
    
    参数:
    
    ch - the char to find.
    
    start - the starting offset.
    
    返回:
    
    the index of the first occurrence of the specified char ch in this string, -1 if found no occurrence.
  - lastIndexOf
```
public int lastIndexOf(java.lang.CharSequence string)
```
    Searches in this string for the last index of the specified string. The search for the string starts at the end and moves towards the beginning of this string.
    
    参数:
    
    string - the string to find.
    
    返回:
    
    the index of the first character of the specified string in this string, -1 if the specified string is not a substring.
    
    抛出:
    
    java.lang.NullPointerException - if string is null.
  - lastIndexOf
```
public int lastIndexOf(java.lang.CharSequence subString,
                       int start)
```
    Searches in this string for the index of the specified string. The search for the string starts at the specified offset and moves towards the beginning of this string.
    
    参数:
    
    subString - the string to find.
    
    start - the starting offset.
    
    返回:
    
    the index of the first character of the specified string in this string , -1 if the specified string is not a substring.
    
    抛出:
    
    java.lang.NullPointerException - if subString is null.
  - regionMatches
```
public boolean regionMatches(int thisStart,
                             java.lang.CharSequence string,
                             int start,
                             int length)
```
    Compares the specified string to this string and compares the specified range of characters to determine if they are the same.
    
    参数:
    
    thisStart - the starting offset in this string.
    
    string - the string to compare.
    
    start - the starting offset in the specified string.
    
    length - the number of characters to compare.
    
    返回:
    
    true if the ranges of characters are equal, false otherwise
    
    抛出:
    
    java.lang.NullPointerException - if string is null.
  - regionMatches
```
public boolean regionMatches(boolean ignoreCase,
                             int thisStart,
                             java.lang.CharSequence string,
                             int start,
                             int length)
```
    Compares the specified string to this string and compares the specified range of characters to determine if they are the same. When ignoreCase is true, the case of the characters is ignored during the comparison.
    
    参数:
    
    ignoreCase - specifies if case should be ignored.
    
    thisStart - the starting offset in this string.
    
    string - the string to compare.
    
    start - the starting offset in the specified string.
    
    length - the number of characters to compare.
    
    返回:
    
    true if the ranges of characters are equal, false otherwise.
    
    抛出:
    
    java.lang.NullPointerException - if string is null.
  - replace
```
public AsciiString replace(char oldChar,
                           char newChar)
```
    Copies this string replacing occurrences of the specified character with another character.
    
    参数:
    
    oldChar - the character to replace.
    
    newChar - the replacement character.
    
    返回:
    
    a new string with occurrences of oldChar replaced by newChar.
  - startsWith
```
public boolean startsWith(java.lang.CharSequence prefix)
```
    Compares the specified string to this string to determine if the specified string is a prefix.
    
    参数:
    
    prefix - the string to look for.
    
    返回:
    
    true if the specified string is a prefix of this string, false otherwise
    
    抛出:
    
    java.lang.NullPointerException - if prefix is null.
  - startsWith
```
public boolean startsWith(java.lang.CharSequence prefix,
                          int start)
```
    Compares the specified string to this string, starting at the specified offset, to determine if the specified string is a prefix.
    
    参数:
    
    prefix - the string to look for.
    
    start - the starting offset.
    
    返回:
    
    true if the specified string occurs in this string at the specified offset, false otherwise.
    
    抛出:
    
    java.lang.NullPointerException - if prefix is null.
  - toLowerCase
```
public AsciiString toLowerCase()
```
    Converts the characters in this string to lowercase, using the default Locale.
    
    返回:
    
    a new string containing the lowercase characters equivalent to the characters in this string.
  - toUpperCase
```
public AsciiString toUpperCase()
```
    Converts the characters in this string to uppercase, using the default Locale.
    
    返回:
    
    a new string containing the uppercase characters equivalent to the characters in this string.
  - trim
```
public static java.lang.CharSequence trim(java.lang.CharSequence c)
```
    Copies this string removing white space characters from the beginning and end of the string, and tries not to copy if possible.
    
    参数:
    
    c - The CharSequence to trim.
    
    返回:
    
    a new string with characters <= \\u0020 removed from the beginning and the end.
  - trim
```
public AsciiString trim()
```
    Duplicates this string removing white space characters from the beginning and end of the string, without copying.
    
    返回:
    
    a new string with characters <= \\u0020 removed from the beginning and the end.
  - contentEquals
```
public boolean contentEquals(java.lang.CharSequence a)
```
    Compares a CharSequence to this String to determine if their contents are equal.
    
    参数:
    
    a - the character sequence to compare to.
    
    返回:
    
    true if equal, otherwise false
  - matches
```
public boolean matches(java.lang.String expr)
```
    Determines whether this string matches a given regular expression.
    
    参数:
    
    expr - the regular expression to be matched.
    
    返回:
    
    true if the expression matches, otherwise false.
    
    抛出:
    
    java.util.regex.PatternSyntaxException - if the syntax of the supplied regular expression is not valid.
    
    java.lang.NullPointerException - if expr is null.
  - split
```
public AsciiString[] split(java.lang.String expr,
                           int max)
```
    Splits this string using the supplied regular expression expr. The parameter max controls the behavior how many times the pattern is applied to the string.
    
    参数:
    
    expr - the regular expression used to divide the string.
    
    max - the number of entries in the resulting array.
    
    返回:
    
    an array of Strings created by separating the string along matches of the regular expression.
    
    抛出:
    
    java.lang.NullPointerException - if expr is null.
    
    java.util.regex.PatternSyntaxException - if the syntax of the supplied regular expression is not valid.
    
    另请参阅:
    
    Pattern.split(CharSequence, int)
  - split
```
public AsciiString[] split(char delim)
```
    Splits the specified String with the specified delimiter..
  - hashCode
```
public int hashCode()
```
    Provides a case-insensitive hash code for Ascii like byte strings.
    
    覆盖:
    
    hashCode 在类中 java.lang.Object
  - equals
```
public boolean equals(java.lang.Object obj)
```
    覆盖:
    
    equals 在类中 java.lang.Object
  - toString
```
public java.lang.String toString()
```
    Translates the entire byte string to a String.
    
    指定者:
    
    toString 在接口中 java.lang.CharSequence
    
    覆盖:
    
    toString 在类中 java.lang.Object
    
    另请参阅:
    
    toString(int)
  - toString
```
public java.lang.String toString(int start)
```
    Translates the entire byte string to a String using the charset encoding.
    
    另请参阅:
    
    toString(int, int)
  - toString
```
public java.lang.String toString(int start,
                                 int end)
```
    Translates the [start, end) range of this byte string to a String.
  - parseBoolean
```
public boolean parseBoolean()
```
  - parseChar
```
public char parseChar()
```
  - parseChar
```
public char parseChar(int start)
```
  - parseShort
```
public short parseShort()
```
  - parseShort
```
public short parseShort(int radix)
```
  - parseShort
```
public short parseShort(int start,
                        int end)
```
  - parseShort
```
public short parseShort(int start,
                        int end,
                        int radix)
```
  - parseInt
```
public int parseInt()
```
  - parseInt
```
public int parseInt(int radix)
```
  - parseInt
```
public int parseInt(int start,
                    int end)
```
  - parseInt
```
public int parseInt(int start,
                    int end,
                    int radix)
```
  - parseLong
```
public long parseLong()
```
  - parseLong
```
public long parseLong(int radix)
```
  - parseLong
```
public long parseLong(int start,
                      int end)
```
  - parseLong
```
public long parseLong(int start,
                      int end,
                      int radix)
```
  - parseFloat
```
public float parseFloat()
```
  - parseFloat
```
public float parseFloat(int start,
                        int end)
```
  - parseDouble
```
public double parseDouble()
```
  - parseDouble
```
public double parseDouble(int start,
                          int end)
```
  - of
```
public static AsciiString of(java.lang.CharSequence string)
```
    Returns an AsciiString containing the given character sequence. If the given string is already a AsciiString, just returns the same instance.
  - cached
```
public static AsciiString cached(java.lang.String string)
```
    Returns an AsciiString containing the given string and retains/caches the input string for later use in toString(). Used for the constants (which already stored in the JVM's string table) and in cases where the guaranteed use of the toString() method.
  - hashCode
```
public static int hashCode(java.lang.CharSequence value)
```
    Returns the case-insensitive hash code of the specified string. Note that this method uses the same hashing algorithm with hashCode() so that you can put both AsciiStrings and arbitrary CharSequences into the same headers.
  - contains
```
public static boolean contains(java.lang.CharSequence a,
                               java.lang.CharSequence b)
```
    Determine if a contains b in a case sensitive manner.
  - containsIgnoreCase
```
public static boolean containsIgnoreCase(java.lang.CharSequence a,
                                         java.lang.CharSequence b)
```
    Determine if a contains b in a case insensitive manner.
  - contentEqualsIgnoreCase
```
public static boolean contentEqualsIgnoreCase(java.lang.CharSequence a,
                                              java.lang.CharSequence b)
```
    Returns true if both CharSequence's are equals when ignore the case. This only supports 8-bit ASCII.
  - containsContentEqualsIgnoreCase
```
public static boolean containsContentEqualsIgnoreCase(java.util.Collection<java.lang.CharSequence> collection,
                                                      java.lang.CharSequence value)
```
    Determine if collection contains value and using contentEqualsIgnoreCase(CharSequence, CharSequence) to compare values.
    
    参数:
    
    collection - The collection to look for and equivalent element as value.
    
    value - The value to look for in collection.
    
    返回:
    
    true if collection contains value according to contentEqualsIgnoreCase(CharSequence, CharSequence). false otherwise.
    
    另请参阅:
    
    contentEqualsIgnoreCase(CharSequence, CharSequence)
  - containsAllContentEqualsIgnoreCase
```
public static boolean containsAllContentEqualsIgnoreCase(java.util.Collection<java.lang.CharSequence> a,
                                                         java.util.Collection<java.lang.CharSequence> b)
```
    Determine if a contains all of the values in b using contentEqualsIgnoreCase(CharSequence, CharSequence) to compare values.
    
    参数:
    
    a - The collection under test.
    
    b - The values to test for.
    
    返回:
    
    true if a contains all of the values in b using contentEqualsIgnoreCase(CharSequence, CharSequence) to compare values. false otherwise.
    
    另请参阅:
    
    contentEqualsIgnoreCase(CharSequence, CharSequence)
  - contentEquals
```
public static boolean contentEquals(java.lang.CharSequence a,
                                    java.lang.CharSequence b)
```
    Returns true if the content of both CharSequence's are equals. This only supports 8-bit ASCII.
  - regionMatches
```
public static boolean regionMatches(java.lang.CharSequence cs,
                                    boolean ignoreCase,
                                    int csStart,
                                    java.lang.CharSequence string,
                                    int start,
                                    int length)
```
    This methods make regionMatches operation correctly for any chars in strings
    
    参数:
    
    cs - the CharSequence to be processed
    
    ignoreCase - specifies if case should be ignored.
    
    csStart - the starting offset in the cs CharSequence
    
    string - the CharSequence to compare.
    
    start - the starting offset in the specified string.
    
    length - the number of characters to compare.
    
    返回:
    
    true if the ranges of characters are equal, false otherwise.
  - regionMatchesAscii
```
public static boolean regionMatchesAscii(java.lang.CharSequence cs,
                                         boolean ignoreCase,
                                         int csStart,
                                         java.lang.CharSequence string,
                                         int start,
                                         int length)
```
    This is optimized version of regionMatches for string with ASCII chars only
    
    参数:
    
    cs - the CharSequence to be processed
    
    ignoreCase - specifies if case should be ignored.
    
    csStart - the starting offset in the cs CharSequence
    
    string - the CharSequence to compare.
    
    start - the starting offset in the specified string.
    
    length - the number of characters to compare.
    
    返回:
    
    true if the ranges of characters are equal, false otherwise.
  - indexOfIgnoreCase
```
public static int indexOfIgnoreCase(java.lang.CharSequence str,
                                    java.lang.CharSequence searchStr,
                                    int startPos)
```
    Case in-sensitive find of the first index within a CharSequence from the specified position.
    
    A null CharSequence will return -1. A negative start position is treated as zero. An empty ("") search CharSequence always matches. A start position greater than the string length only matches an empty search CharSequence.
```
 AsciiString.indexOfIgnoreCase(null, *, *)          = -1
 AsciiString.indexOfIgnoreCase(*, null, *)          = -1
 AsciiString.indexOfIgnoreCase("", "", 0)           = 0
 AsciiString.indexOfIgnoreCase("aabaabaa", "A", 0)  = 0
 AsciiString.indexOfIgnoreCase("aabaabaa", "B", 0)  = 2
 AsciiString.indexOfIgnoreCase("aabaabaa", "AB", 0) = 1
 AsciiString.indexOfIgnoreCase("aabaabaa", "B", 3)  = 5
 AsciiString.indexOfIgnoreCase("aabaabaa", "B", 9)  = -1
 AsciiString.indexOfIgnoreCase("aabaabaa", "B", -1) = 2
 AsciiString.indexOfIgnoreCase("aabaabaa", "", 2)   = 2
 AsciiString.indexOfIgnoreCase("abc", "", 9)        = -1
 
```
    参数:
    
    str - the CharSequence to check, may be null
    
    searchStr - the CharSequence to find, may be null
    
    startPos - the start position, negative treated as zero
    
    返回:
    
    the first index of the search CharSequence (always ≥ startPos), -1 if no match or null string input
  - indexOfIgnoreCaseAscii
```
public static int indexOfIgnoreCaseAscii(java.lang.CharSequence str,
                                         java.lang.CharSequence searchStr,
                                         int startPos)
```
    Case in-sensitive find of the first index within a CharSequence from the specified position. This method optimized and works correctly for ASCII CharSequences only
    
    A null CharSequence will return -1. A negative start position is treated as zero. An empty ("") search CharSequence always matches. A start position greater than the string length only matches an empty search CharSequence.
```
 AsciiString.indexOfIgnoreCase(null, *, *)          = -1
 AsciiString.indexOfIgnoreCase(*, null, *)          = -1
 AsciiString.indexOfIgnoreCase("", "", 0)           = 0
 AsciiString.indexOfIgnoreCase("aabaabaa", "A", 0)  = 0
 AsciiString.indexOfIgnoreCase("aabaabaa", "B", 0)  = 2
 AsciiString.indexOfIgnoreCase("aabaabaa", "AB", 0) = 1
 AsciiString.indexOfIgnoreCase("aabaabaa", "B", 3)  = 5
 AsciiString.indexOfIgnoreCase("aabaabaa", "B", 9)  = -1
 AsciiString.indexOfIgnoreCase("aabaabaa", "B", -1) = 2
 AsciiString.indexOfIgnoreCase("aabaabaa", "", 2)   = 2
 AsciiString.indexOfIgnoreCase("abc", "", 9)        = -1
 
```
    参数:
    
    str - the CharSequence to check, may be null
    
    searchStr - the CharSequence to find, may be null
    
    startPos - the start position, negative treated as zero
    
    返回:
    
    the first index of the search CharSequence (always ≥ startPos), -1 if no match or null string input
  - indexOf
```
public static int indexOf(java.lang.CharSequence cs,
                          char searchChar,
                          int start)
```
    Finds the first index in the CharSequence that matches the specified character.
    
    参数:
    
    cs - the CharSequence to be processed, not null
    
    searchChar - the char to be searched for
    
    start - the start index, negative starts at the string start
    
    返回:
    
    the index where the search char was found, -1 if char searchChar is not found or cs == null
  - toLowerCase
```
public static char toLowerCase(char c)
```
    If the character is uppercase - converts the character to lowercase, otherwise returns the character as it is. Only for ASCII characters.
    
    返回:
    
    lowercase ASCII character equivalent
  - isUpperCase
```
public static boolean isUpperCase(byte value)
```
  - isUpperCase
```
public static boolean isUpperCase(char value)
```
  - c2b
```
public static byte c2b(char c)
```
  - b2c
```
public static char b2c(byte b)
```

类 AsciiString

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

从接口继承的方法 java.lang.CharSequence

字段详细资料

EMPTY_STRING

INDEX_NOT_FOUND

CASE_INSENSITIVE_HASHER

CASE_SENSITIVE_HASHER

构造器详细资料

AsciiString

AsciiString

AsciiString

AsciiString

AsciiString

AsciiString

AsciiString

AsciiString

AsciiString

AsciiString

AsciiString

AsciiString

AsciiString

AsciiString

方法详细资料

forEachByte

forEachByte

forEachByteDesc

forEachByteDesc

byteAt

isEmpty

length

arrayChanged

array

arrayOffset

isEntireArrayUsed

toByteArray

toByteArray

copy

charAt

contains

compareTo

concat

endsWith

contentEqualsIgnoreCase

toCharArray

toCharArray

copy

subSequence

subSequence

subSequence

indexOf

indexOf

indexOf

lastIndexOf

lastIndexOf

regionMatches

regionMatches

replace

startsWith

startsWith

toLowerCase

toUpperCase

trim

trim

contentEquals

matches

split

split

hashCode

equals

toString

toString

toString

parseBoolean

parseChar

parseChar

parseShort