Constructor Detail

• CharSetUtils

  public CharSetUtils()

  CharSetUtils instances should NOT be constructed in standard programming. Instead, the class should be used as CharSetUtils.evaluateSet(null);.

  This constructor is public to permit tools that require a JavaBean instance to operate.

Method Detail

• squeeze

  public static String squeeze(String str,
               String... set)

  Squeezes any repetitions of a character that is mentioned in the supplied set.

   CharSetUtils.squeeze(null, *)        = null
   CharSetUtils.squeeze("", *)          = ""
   CharSetUtils.squeeze(*, null)        = *
   CharSetUtils.squeeze(*, "")          = *
   CharSetUtils.squeeze("hello", "k-p") = "helo"
   CharSetUtils.squeeze("hello", "a-e") = "hello"
   

  Parameters:

  str - the string to squeeze, may be null

  set - the character set to use for manipulation, may be null

  Returns:

  the modified String, null if null string input

  See Also:

  for set-syntax.

• containsAny

  public static boolean containsAny(String str,
                    String... set)

  Takes an argument in set-syntax, see evaluateSet, and identifies whether any of the characters are present in the specified string.

   CharSetUtils.containsAny(null, *)        = false
   CharSetUtils.containsAny("", *)          = false
   CharSetUtils.containsAny(*, null)        = false
   CharSetUtils.containsAny(*, "")          = false
   CharSetUtils.containsAny("hello", "k-p") = true
   CharSetUtils.containsAny("hello", "a-d") = false
   

  Parameters:

  str - String to look for characters in, may be null

  set - String[] set of characters to identify, may be null

  Returns:

  whether or not the characters in the set are in the primary string

  Since:

  3.2

  See Also:

  for set-syntax.

• count

  public static int count(String str,
          String... set)

  Takes an argument in set-syntax, see evaluateSet, and returns the number of characters present in the specified string.

   CharSetUtils.count(null, *)        = 0
   CharSetUtils.count("", *)          = 0
   CharSetUtils.count(*, null)        = 0
   CharSetUtils.count(*, "")          = 0
   CharSetUtils.count("hello", "k-p") = 3
   CharSetUtils.count("hello", "a-e") = 1
   

  Parameters:

  str - String to count characters in, may be null

  set - String[] set of characters to count, may be null

  Returns:

  the character count, zero if null string input

  See Also:

  for set-syntax.

• keep

  public static String keep(String str,
            String... set)

  Takes an argument in set-syntax, see evaluateSet, and keeps any of characters present in the specified string.

   CharSetUtils.keep(null, *)        = null
   CharSetUtils.keep("", *)          = ""
   CharSetUtils.keep(*, null)        = ""
   CharSetUtils.keep(*, "")          = ""
   CharSetUtils.keep("hello", "hl")  = "hll"
   CharSetUtils.keep("hello", "le")  = "ell"
   

  Parameters:

  str - String to keep characters from, may be null

  set - String[] set of characters to keep, may be null

  Returns:

  the modified String, null if null string input

  Since:

  2.0

  See Also:

  for set-syntax.

• delete

  public static String delete(String str,
              String... set)

  Takes an argument in set-syntax, see evaluateSet, and deletes any of characters present in the specified string.

   CharSetUtils.delete(null, *)        = null
   CharSetUtils.delete("", *)          = ""
   CharSetUtils.delete(*, null)        = *
   CharSetUtils.delete(*, "")          = *
   CharSetUtils.delete("hello", "hl")  = "eo"
   CharSetUtils.delete("hello", "le")  = "ho"
   

  Parameters:

  str - String to delete characters from, may be null

  set - String[] set of characters to delete, may be null

  Returns:

  the modified String, null if null string input

  See Also:

  for set-syntax.