Package org.apache.commons.text

Class CaseUtils

java.lang.Object
org.apache.commons.text.CaseUtils
public class CaseUtils extends Object
Case manipulation operations on Strings that contain words.

This class tries to handle null input gracefully. An exception will not be thrown for a null input. Each method documents its behavior in more detail.

Since:
1.2

  • Constructor Summary

    Constructors
    Constructor
    Description
    CaseUtils()
    CaseUtils instances should NOT be constructed in standard programming.

  • Method Summary

    Modifier and Type
    Method
    Description
    static String
    toCamelCase(String str, boolean capitalizeFirstLetter, char... delimiters)
    Converts all the delimiter separated words in a String into camelCase, that is each word is made up of a title case character and then a series of lowercase characters.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • CaseUtils

      public CaseUtils()
      CaseUtils instances should NOT be constructed in standard programming. Instead, the class should be used as CaseUtils.toCamelCase("foo bar", true, new char[]{'-'});.

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

  • Method Details

    • toCamelCase

      public static String toCamelCase(String str, boolean capitalizeFirstLetter, char... delimiters)
      Converts all the delimiter separated words in a String into camelCase, that is each word is made up of a title case character and then a series of lowercase characters.

      The delimiters represent a set of characters understood to separate words. The first non-delimiter character after a delimiter will be capitalized. The first String character may or may not be capitalized and it's determined by the user input for capitalizeFirstLetter variable.

      A null input String returns null.

      A input string with only delimiter characters returns "".

      Capitalization uses the Unicode title case, normally equivalent to upper case and cannot perform locale-sensitive mappings. 
       CaseUtils.toCamelCase(null, false)                                 = null
 CaseUtils.toCamelCase("", false, *)                                = ""
 CaseUtils.toCamelCase(*, false, null)                              = *
 CaseUtils.toCamelCase(*, true, new char[0])                        = *
 CaseUtils.toCamelCase("To.Camel.Case", false, new char[]{'.'})     = "toCamelCase"
 CaseUtils.toCamelCase(" to @ Camel case", true, new char[]{'@'})   = "ToCamelCase"
 CaseUtils.toCamelCase(" @to @ Camel case", false, new char[]{'@'}) = "toCamelCase"
 CaseUtils.toCamelCase(" @", false, new char[]{'@'})                = ""
      Parameters:
      str - the String to be converted to camelCase, may be null
      capitalizeFirstLetter - boolean that determines if the first character of first word should be title case.
      delimiters - set of characters to determine capitalization, null and/or empty array means whitespace
      Returns:
      camelCase of String, null if null String input