Converting String to Character array in Java

Question

I want to convert a String to an array of objects of Character class but I am unable to perform the conversion  I know that I can convert a String to an array of primitive datatype type  char  with the toCharArray   method but it doesn t help in converting a String to an array of objects of Character type   How would I go about doing so

User · Answer

chaining is always best  D  String str    somethingPutHere   Character   c   ArrayUtils toObject str toCharArray

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One liner with java-8   String str    testString       t  e  s  t  S  t  r  i  n  g  Character   charObjectArray        str chars   mapToObj c - gt   char c  toArray Character    new      What it does is    get an IntStream of the characters  you may want to also look at codePoints    map each  character  value to Character  you need to cast to actually say that its really a char  and then Java will box it automatically to Character  get the resulting array by calling toArray

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This method take String as a argument and return the Character Array          param sourceString                String as argument     return CharcterArray     public static Character   toCharacterArray String sourceString        char   charArrays   new char sourceString length         charArrays   sourceString toCharArray        Character   characterArray   new Character charArrays length       for  int i   0  i  lt  charArrays length  i              characterArray i    charArrays i             return characterArray

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You have to write your own method in this case  Use a loop and get each character using charAt i  and set it to your Character   array using arrayname i    string charAt i

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If you don t want to rely on third party API s  here is a working code for JDK7 or below  I am not instantiating temporary Character Objects as done by other solutions above  foreach loops are more readable  see yourself     public static Character   convertStringToCharacterArray String str        if  str    null    str isEmpty              return null            char   c   str toCharArray        final int len   c length      int counter   0      final Character   result   new Character len       while  len  gt  counter            for  char ch   c                result counter      ch                      return result

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I used the StringReader class in java io  One of it s functions read char   cbuf  reads a string s contents into an array   String str    hello   char   array   new char str length     StringReader read   new StringReader str    try       read read array     Reads string into the array  Throws IOException   catch  IOException e        e printStackTrace       for  int i   0  i  lt  str length    i              System out println  array   i        array i        Running this gives you the output   array 0    h array 1    e array 2    l array 3    l array 4    o

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Converting String to Character Array and then Converting Character array back to String       Givent String    String given    asdcbsdcagfsdbgdfanfghbsfdab         Converting String to Character Array It s an inbuild method of a String     char   characterArray   given toCharArray         returns    a  s  d  c  b  s  d  c  a  g  f  s  d  b  g  d  f  a  n  f  g  h  b  s  f  d  a  b      ONE WAY   Converting back Character array to String    int length   Arrays toString characterArray  replaceAll            length         First Way to get the string back   Arrays toString characterArray  replaceAll            substring 1 length-1      returns asdcbsdcagfsdbgdfanfghbsfdab   or       Second way to get the string back   Arrays toString characterArray  replaceAll            replace         replace             returns asdcbsdcagfsdbgdfanfghbsfdab     Second WAY   Converting back Character array to String  String valueOf characterArray       Third WAY   Converting back Character array to String  Arrays stream characterArray              mapToObj i - gt   char i              collect Collectors joining       Converting string to Character Array  Character   charObjectArray                              givenString chars                                   mapToObj c - gt   char c                                  toArray Character    new     Converting char array to Character Array   String givenString    MyNameIsArpan   char   givenchararray   givenString toCharArray           String valueOf givenchararray  chars   mapToObj c - gt                             char c  toArray Character    new     benefits of Converting char Array to Character Array you can use the Arrays stream funtion to get the sub array  String subStringFromCharacterArray                   Arrays stream charObjectArray 2 6                             map String  valueOf                             collect Collectors joining

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another way to do it   String str  I am a good boy       char   chars str toCharArray         Character   characters new Character chars length       for  int i   0  i  lt  chars length  i              characters i  chars i           System out println chars i

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if you are working with JTextField then it can be helpfull    public JTextField display  String number e getActionCommand     display setText display getText   number    ch number toCharArray    for  int i 0  i lt ch length  i        System out println  in array a1    ch i

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Why not write a little method yourself  public Character   toCharacterArray  String s         if   s    null          return null           int len   s length       Character   array   new Character len      for  int i   0  i  lt  len   i                      Character char  is deprecated since Java SE 9  amp  JDK 9       Link  https   docs oracle com javase 9 docs api java lang Character html       array i    new Character s charAt i                   array i    s charAt i            return array

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String toCharArray returns an array of char  what you have is an array of Character  In most cases it doesn t matter if you use char or Character as there is autoboxing  The problem in your case is that arrays are not autoboxed  I suggest you use an array of char  char

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Use this   String str    testString   char   charArray   str toCharArray    Character   charObjectArray   ArrayUtils toObject charArray

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I hope the code below will help you   String s  Welcome to Java Programming   char arr   s toCharArray    for int i 0 i lt arr length i         System out println  Data at    i      arr i        It s working and the output is   Data at  0  W Data at  1  e Data at  2  l Data at  3  c Data at  4  o Data at  5  m Data at  6  e Data at  7    Data at  8  t Data at  9  o Data at  10    Data at  11  J Data at  12  a Data at  13  v Data at  14  a Data at  15    Data at  16  P Data at  17  r Data at  18  o Data at  19  g Data at  20  r Data at  21  a Data at  22  m Data at  23  m Data at  24  i Data at  25  n Data at  26  g

[java] Converting String to "Character" array in Java

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