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## org.apache.commons.lang
Class CharRange

    java.lang.Object
      |
      +--org.apache.commons.lang.CharRange

All Implemented Interfaces:
  Serializable

public final class CharRange
extends Object
implements Serializable

A contiguous range of characters, optionally negated.

Instances are immutable.

Since:
  1.0
Version:
  $Id: CharRange.java 471626 2006-11-06 04:02:09Z bayard $
Author:
  Stephen Colebourne, Chris Feldhacker, Gary Gregory
See Also:
  Serialized Form

Constructor Summary
`CharRange(char ch)` Constructs a `CharRange` over a single character.
`CharRange(char ch, boolean negated)` Constructs a `CharRange` over a single character, optionally negating the range.
`CharRange(char start, char end)` Constructs a `CharRange` over a set of characters.
`CharRange(char start, char end, boolean negated)` Constructs a `CharRange` over a set of characters, optionally negating the range.

Method Summary
`boolean` | `contains(char ch)` Is the character specified contained in this range.
`boolean` | `contains(CharRange range)` Are all the characters of the passed in range contained in this range.
`boolean` | `equals(Object obj)` Compares two CharRange objects, returning true if they represent exactly the same range of characters defined in the same way.
`char` | `getEnd()` Gets the end character for this character range.
`char` | `getStart()` Gets the start character for this character range.
`int` | `hashCode()` Gets a hashCode compatible with the equals method.
`boolean` | `isNegated()` Is this `CharRange` negated.
`String` | `toString()` Gets a string representation of the character range.

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

Constructor Detail

### CharRange

    public CharRange(char ch)

  Constructs a `CharRange` over a single character.

  Parameters:
    `ch` - only character in this range

### CharRange

    public CharRange(char ch,
                     boolean negated)

  Constructs a `CharRange` over a single character, optionally negating the range.

  A negated range includes everything except the specified char.

  Parameters:
    `ch` - only character in this range
    `negated` - true to express everything except the range

### CharRange

    public CharRange(char start,
                     char end)

  Constructs a `CharRange` over a set of characters.

  Parameters:
    `start` - first character, inclusive, in this range
    `end` - last character, inclusive, in this range

### CharRange

    public CharRange(char start,
                     char end,
                     boolean negated)

  Constructs a `CharRange` over a set of characters, optionally negating the range.

  A negated range includes everything except that defined by the start and end characters.

  If start and end are in the wrong order, they are reversed. Thus `a-e` is the same as `e-a`.

  Parameters:
    `start` - first character, inclusive, in this range
    `end` - last character, inclusive, in this range
    `negated` - true to express everything except the range

Method Detail

### getStart

    public char getStart()

  Gets the start character for this character range.

  Returns:
    the start char (inclusive)

### getEnd

    public char getEnd()

  Gets the end character for this character range.

  Returns:
    the end char (inclusive)

### isNegated

    public boolean isNegated()

  Is this `CharRange` negated.

  A negated range includes everything except that defined by the start and end characters.

  Returns:
    `true` is negated

### contains

    public boolean contains(char ch)

  Is the character specified contained in this range.

  Parameters:
    `ch` - the character to check
  Returns:
    `true` if this range contains the input character

### contains

    public boolean contains(CharRange range)

  Are all the characters of the passed in range contained in this range.

  Parameters:
    `range` - the range to check against
  Returns:
    `true` if this range entirely contains the input range
  Throws:
    `IllegalArgumentException` - if `null` input

### equals

    public boolean equals(Object obj)

  Compares two CharRange objects, returning true if they represent exactly the same range of characters defined in the same way.

  Overrides:
    `equals` in class `Object`
  Parameters:
    `obj` - the object to compare to
  Returns:
    true if equal

### hashCode

    public int hashCode()

  Gets a hashCode compatible with the equals method.

  Overrides:
    `hashCode` in class `Object`
  Returns:
    a suitable hashCode

### toString

    public String toString()

  Gets a string representation of the character range.

  Overrides:
    `toString` in class `Object`
  Returns:
    string representation of this range

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