CharsRef (Lucene 8.9.0 API)乐学网一站式学习平台

java.lang.Object
- org.apache.lucene.util.CharsRef

All Implemented Interfaces:

CharSequence, Cloneable, Comparable<CharsRef>
```
public final class CharsRef
extends Object
implements Comparable<CharsRef>, CharSequence, Cloneable
```
Represents char[], as a slice (offset + length) into an existing char[]. The chars member should never be null; use EMPTY_CHARS if necessary.

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

Field Summary

Fields
Modifier and Type	Field and Description
`char[]`	`chars` The contents of the CharsRef.
`static char[]`	`EMPTY_CHARS` An empty character array for convenience
`int`	`length` Length of used characters.
`int`	`offset` Offset of first valid character.

Constructor Summary

Constructors
Constructor and Description
`CharsRef()` Creates a new `CharsRef` initialized an empty array zero-length
`CharsRef(char[] chars, int offset, int length)` Creates a new `CharsRef` initialized with the given array, offset and length
`CharsRef(int capacity)` Creates a new `CharsRef` initialized with an array of the given capacity
`CharsRef(String string)` Creates a new `CharsRef` initialized with the given Strings character array

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`char`	`charAt(int index)`
`boolean`	`charsEquals(CharsRef other)`
`CharsRef`	`clone()` Returns a shallow clone of this instance (the underlying characters are not copied and will be shared by both the returned object and this object.
`int`	`compareTo(CharsRef other)` Signed int order comparison
`static CharsRef`	`deepCopyOf(CharsRef other)` Creates a new CharsRef that points to a copy of the chars from `other`
`boolean`	`equals(Object other)`
`static Comparator<CharsRef>`	`getUTF16SortedAsUTF8Comparator()` Deprecated. This comparator is only a transition mechanism
`int`	`hashCode()`
`boolean`	`isValid()` Performs internal consistency checks.
`int`	`length()`
`static int`	`stringHashCode(char[] chars, int offset, int length)`
`CharSequence`	`subSequence(int start, int end)`
`String`	`toString()`

Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.CharSequence
chars, codePoints

- Field Detail
  - EMPTY_CHARS
```
public static final char[] EMPTY_CHARS
```
    An empty character array for convenience
  - chars
```
public char[] chars
```
    The contents of the CharsRef. Should never be null.
  - offset
```
public int offset
```
    Offset of first valid character.
  - length
```
public int length
```
    Length of used characters.
- Constructor Detail
  - CharsRef
```
public CharsRef()
```
    Creates a new CharsRef initialized an empty array zero-length
  - CharsRef
```
public CharsRef(int capacity)
```
    Creates a new CharsRef initialized with an array of the given capacity
  - CharsRef
```
public CharsRef(char[] chars,
                int offset,
                int length)
```
    Creates a new CharsRef initialized with the given array, offset and length
  - CharsRef
```
public CharsRef(String string)
```
    Creates a new CharsRef initialized with the given Strings character array
- Method Detail
  - clone
```
public CharsRef clone()
```
    Returns a shallow clone of this instance (the underlying characters are not copied and will be shared by both the returned object and this object.
    
    Overrides:
    
    clone in class Object
    
    See Also:
    
    deepCopyOf(org.apache.lucene.util.CharsRef)
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - stringHashCode
```
public static int stringHashCode(char[] chars,
                                 int offset,
                                 int length)
```
    Returns:
    
    the hash code of the given char sub-array, calculated by String.hashCode() specification
  - equals
```
public boolean equals(Object other)
```
    Overrides:
    
    equals in class Object
  - charsEquals
```
public boolean charsEquals(CharsRef other)
```
  - compareTo
```
public int compareTo(CharsRef other)
```
    Signed int order comparison
    
    Specified by:
    
    compareTo in interface Comparable<CharsRef>
  - toString
```
public String toString()
```
    Specified by:
    
    toString in interface CharSequence
    
    Overrides:
    
    toString in class Object
  - length
```
public int length()
```
    Specified by:
    
    length in interface CharSequence
  - charAt
```
public char charAt(int index)
```
    Specified by:
    
    charAt in interface CharSequence
  - subSequence
```
public CharSequence subSequence(int start,
                                int end)
```
    Specified by:
    
    subSequence in interface CharSequence
  - getUTF16SortedAsUTF8Comparator
```
@Deprecated
public static Comparator<CharsRef> getUTF16SortedAsUTF8Comparator()
```
    Deprecated. This comparator is only a transition mechanism
  - deepCopyOf
```
public static CharsRef deepCopyOf(CharsRef other)
```
    Creates a new CharsRef that points to a copy of the chars from other
    The returned CharsRef will have a length of other.length and an offset of zero.
  - isValid
```
public boolean isValid()
```
    Performs internal consistency checks. Always returns true (or throws IllegalStateException)

Class CharsRef

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface java.lang.CharSequence

Field Detail

EMPTY_CHARS

chars

offset

length

Constructor Detail

CharsRef

CharsRef

CharsRef

CharsRef

Method Detail

clone

hashCode

stringHashCode

equals

charsEquals

compareTo

toString

length

charAt

subSequence

getUTF16SortedAsUTF8Comparator

deepCopyOf

isValid