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## org.crosswire.common.util
Class StringUtil

    java.lang.Object
      org.crosswire.common.util.StringUtil

    public final class StringUtil

extends Object

A generic class of String utils. It would be good if we could put this stuff in java.lang ...

Author:
  Joe Walker [joe at eireneh dot com]
See Also:
  `for license details.
  The copyright to this program is held by it's authors.`

Field Summary
`static String[]` | `EMPTY_STRING_ARRAY` An empty immutable `String` array.
`static String` | `NEWLINE` The newline character

Constructor Summary
`private` | `StringUtil()` Prevent Instansiation

Method Summary
`static String` | `createTitle(String variable)` This function creates a readable title from a variable name type input.
`static String` | `getInitials(String sentence)` For example getInitials("Java DataBase Connectivity") = "JDC" and getInitials("Church of England") = "CoE".
`static String` | `join(Object[] array, String aSeparator)` Joins the elements of the provided array into a single String containing the provided list of elements.
`static String` | `read(Reader in)` This method reads an InputStream In its entirety, and passes The text back as a string.
`static String[]` | `split(String str)` Splits the provided text into an array, using whitespace as the separator.
`static String[]` | `split(String str, char separatorChar)` Splits the provided text into an array, separator specified.
`static String[]` | `split(String str, String separatorChars)` Splits the provided text into an array, separators specified.
`static String[]` | `split(String str, String separatorChars, int max)` Splits the provided text into an array, separators specified.
`static String[]` | `splitAll(String str, char separatorChar)` Splits the provided text into an array, separator specified.

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

Field Detail

### NEWLINE

    public static final String NEWLINE

  The newline character

### EMPTY_STRING_ARRAY

    public static final String[] EMPTY_STRING_ARRAY

  An empty immutable `String` array.

Constructor Detail

### StringUtil

    private StringUtil()

  Prevent Instansiation

Method Detail

### read

    public static String read(Reader in)
                       throws IOException

  This method reads an InputStream In its entirety, and passes The text back as a string. If you are reading from a source that can block then be preapred for a long wait for this to return.

  Parameters:
    `in` - The Stream to read from.
  Returns:
    A string containing all the text from the Stream.
  Throws:
    `IOException`

### createTitle

    public static String createTitle(String variable)

  This function creates a readable title from a variable name type input. For example calling: StringUtil.createTitle("one_two") = "One Two" StringUtil.createTitle("oneTwo") = "One Two"

### getInitials

    public static String getInitials(String sentence)

  For example getInitials("Java DataBase Connectivity") = "JDC" and getInitials("Church of England") = "CoE".

  Parameters:
    `sentence` - The phrase from which to get the initial letters.
  Returns:
    The initial letters in the given words.

### split

    public static String[] split(String str)

  Splits the provided text into an array, using whitespace as the separator. Whitespace is defined by `Character.isWhitespace(char)`.

  The separator is not included in the returned String array. Adjacent separators are treated as one separator.

  A `null` input String returns `null`.

       StringUtils.split(null)       = null
       StringUtils.split("")         = []
       StringUtils.split("abc def")  = ["abc", "def"]
       StringUtils.split("abc  def") = ["abc", "def"]
       StringUtils.split(" abc ")    = ["abc"]

  Parameters:
    `str` - the String to parse, may be null
  Returns:
    an array of parsed Strings, `null` if null String input

### split

    public static String[] split(String str,
                                 char separatorChar)

  Splits the provided text into an array, separator specified. This is an alternative to using StringTokenizer.

  The separator is not included in the returned String array. Adjacent separators are treated as one separator.

  A `null` input String returns `null`.

       StringUtils.split(null, *)         = null
       StringUtils.split("", *)           = []
       StringUtils.split("a.b.c", '.')    = ["a", "b", "c"]
       StringUtils.split("a..b.c", '.')   = ["a", "b", "c"]
       StringUtils.split("a:b:c", '.')    = ["a:b:c"]
       StringUtils.split("a\tb\nc", null) = ["a", "b", "c"]
       StringUtils.split("a b c", ' ')    = ["a", "b", "c"]

  Parameters:
    `str` - the String to parse, may be null
    `separatorChar` - the character used as the delimiter, `null` splits on whitespace
  Returns:
    an array of parsed Strings
  Since:
    2.0

### splitAll

    public static String[] splitAll(String str,
                                    char separatorChar)

  Splits the provided text into an array, separator specified. This is an alternative to using StringTokenizer.

  The separator is not included in the returned String array. Adjacent separators are treated individually.

  A `null` input String returns `null`.

       StringUtils.split(null, *)         = null
       StringUtils.split("", *)           = []
       StringUtils.split("a.b.c", '.')    = ["a", "b", "c"]
       StringUtils.split("a..b.c", '.')   = ["a", "b", "c"]
       StringUtils.split("a:b:c", '.')    = ["a:b:c"]
       StringUtils.split("a\tb\nc", null) = ["a", "b", "c"]
       StringUtils.split("a b c", ' ')    = ["a", "b", "c"]

  Parameters:
    `str` - the String to parse, may be null
    `separatorChar` - the character used as the delimiter, `null` splits on whitespace
  Returns:
    an array of parsed Strings
  Since:
    2.0

### split

    public static String[] split(String str,
                                 String separatorChars)

  Splits the provided text into an array, separators specified. This is an alternative to using StringTokenizer.

  The separator is not included in the returned String array. Adjacent separators are treated as one separator.

  A `null` input String returns `null`. A `null` separatorChars splits on whitespace.

       StringUtils.split(null, *)         = null
       StringUtils.split("", *)           = []
       StringUtils.split("abc def", null) = ["abc", "def"]
       StringUtils.split("abc def", " ")  = ["abc", "def"]
       StringUtils.split("abc  def", " ") = ["abc", "def"]
       StringUtils.split("ab:cd:ef", ":") = ["ab", "cd", "ef"]

  Parameters:
    `str` - the String to parse, may be null
    `separatorChars` - the characters used as the delimiters, `null` splits on whitespace
  Returns:
    an array of parsed Strings, `null` if null String input

### split

    public static String[] split(String str,
                                 String separatorChars,
                                 int max)

  Splits the provided text into an array, separators specified. This is an alternative to using StringTokenizer.

  The separator is not included in the returned String array. Adjacent separators are treated as one separator.

  A `null` input String returns `null`. A `null` separatorChars splits on whitespace.

       StringUtils.split(null, *, *)            = null
       StringUtils.split("", *, *)              = []
       StringUtils.split("ab de fg", null, 0)   = ["ab", "cd", "ef"]
       StringUtils.split("ab   de fg", null, 0) = ["ab", "cd", "ef"]
       StringUtils.split("ab:cd:ef", ":", 0)    = ["ab", "cd", "ef"]
       StringUtils.split("ab:cd:ef", ":", 2)    = ["ab", "cdef"]

  Parameters:
    `str` - the String to parse, may be null
    `separatorChars` - the characters used as the delimiters, `null` splits on whitespace
    `max` - the maximum number of elements to include in the array. A zero or negative value implies no limit
  Returns:
    an array of parsed Strings

### join

    public static String join(Object[] array,
                              String aSeparator)

  Joins the elements of the provided array into a single String containing the provided list of elements.

  No delimiter is added before or after the list. A `null` separator is the same as an empty String (""). Null objects or empty strings within the array are represented by empty strings.

       StringUtils.join(null, *)                = null
       StringUtils.join([], *)                  = ""
       StringUtils.join([null], *)              = ""
       StringUtils.join(["a", "b", "c"], "--")  = "a--b--c"
       StringUtils.join(["a", "b", "c"], null)  = "abc"
       StringUtils.join(["a", "b", "c"], "")    = "abc"
       StringUtils.join([null, "", "a"], ',')   = ",,a"

  Parameters:
    `array` - the array of values to join together, may be null
    `aSeparator` - the separator character to use, null treated as ""
  Returns:
    the joined String, `null` if null array input

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