Better way to generate array of all letters in the alphabet

Question

Right now I m doing  for  char c    a   c  lt    z   c          alphabet c -  a     c      but is there a better way to do it  Similar to Scala s  a  to  z

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import java util    public class Experiments    List uptoChar int i          char c  a            List list   new LinkedList             for                  list add c          if list size    i                break                      c                          return list                public static void main  String    args             Experiments experiments   new Experiments              System out println experiments uptoChar 26

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This is a fun Unicode solution   char   alpha   new char 26  for int i   0  i  lt  26  i         alpha i     char  97   i      This generates a lower-cased version of alphabet  if you want upper-cased  you can replace  97  with  65    Hope this helps

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static String   AlphabetWithDigits     0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z    a    b    c    d    e    f    g    h    i    j    k    l    m    n    o    p    q    r    s    t    u    v    w    x    y    z

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In Java 8 with Stream API  you can do this   IntStream rangeClosed  A    Z   mapToObj var - gt   char  var  forEach System out  println

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Here are a few alternatives based on tom thomas  answer   Character Array           char   list   IntStream concat                  IntStream rangeClosed  0    9                    IntStream rangeClosed  A    Z             mapToObj c - gt   char  c     collect Collectors joining    toCharArray      String Array   Note  Won t work correctly if your delimiter is one of the values  too           String   list   IntStream concat                  IntStream rangeClosed  0    9                    IntStream rangeClosed  A    Z             mapToObj c - gt   char  c      collect Collectors joining    split         String List   Note  Won t work correctly if your delimiter is one of the values  too           List lt String gt  list   Arrays asList IntStream concat                  IntStream rangeClosed  0    9                    IntStream rangeClosed  A    Z             mapToObj c - gt   char  c      collect Collectors joining    split

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Using Java 8 streams    char    alphabets   Stream iterate  a    x - gt   char  x   1                limit 26               map c - gt  c toString                 reduce      u   v  - gt  u   v  toCharArray

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I think that this ends up a little cleaner  you don t have to deal with the subtraction and indexing   char   alphabet    abcdefghijklmnopqrstuvwxyz  toCharArray

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char   alphabet     a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z

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for  char letter    a   letter  lt    z   letter          System out println letter

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char   abc   new char 26    for int i   0  i lt 26 i          abc i     char   a  i

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If you are using Java 8   char   charArray   IntStream rangeClosed  A    Z        mapToObj c - gt        char  c  collect Collectors joining    toCharArray

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with io vavr  public static char   alphanumericAlphabet         return CharSeq              rangeClosed  0   9                appendAll CharSeq rangeClosed  a   z                 appendAll CharSeq rangeClosed  A   Z                 toCharArray

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To get uppercase letters in addition to lower case letters  you could also do the following   String alphabetWithUpper    abcdefghijklmnopqrstuvwxyz     abcdefghijklmnopqrstuvwxyz  toUpperCase    char   letters   alphabetWithUpper toCharArray

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Define any languages an enum  and call getAlphabet    char   armenianAlphabet   getAlphabet LocaleLanguage ARMENIAN   char   russianAlphabet   getAlphabet LocaleLanguage RUSSIAN       get uppercase alphabet  char   currentAlphabet   getAlphabet true        System out println armenianAlphabet   System out println russianAlphabet   System out println currentAlphabet    result  I System out                                         I System out                                   I System out  ABCDEFGHIJKLMNOPQRSTUVWXYZ  private char   getAlphabet        return getAlphabet false      private char   getAlphabet boolean flagToUpperCase       Locale locale   getResources   getConfiguration   locale      LocaleLanguage language   LocaleLanguage getLocalLanguage locale       return getAlphabet language  flagToUpperCase      private char   getAlphabet LocaleLanguage localeLanguage  boolean flagToUpperCase       if  localeLanguage    null          localeLanguage   LocaleLanguage ENGLISH       char firstLetter   localeLanguage getFirstLetter        char lastLetter   localeLanguage getLastLetter        int alphabetSize   lastLetter - firstLetter   1       char   alphabet   new char alphabetSize        for  int index   0  index  lt  alphabetSize  index              alphabet index     char   index   firstLetter              if  flagToUpperCase           alphabet   new String alphabet  toUpperCase   toCharArray               return alphabet     private enum LocaleLanguage      ARMENIAN new Locale  quot hy quot                   RUSSIAN new Locale  quot ru quot                  ENGLISH new Locale  quot en quot     a   z         private final Locale mLocale      private final char mFirstLetter      private final char mLastLetter       LocaleLanguage Locale locale  char firstLetter  char lastLetter            this mLocale   locale          this mFirstLetter   firstLetter          this mLastLetter   lastLetter             public Locale getLocale             return mLocale             public char getFirstLetter             return mFirstLetter             public char getLastLetter             return mLastLetter             public String getDisplayLanguage            return getLocale   getDisplayLanguage               public String getDisplayLanguage LocaleLanguage locale           return getLocale   getDisplayLanguage locale getLocale                 Nullable     public static LocaleLanguage getLocalLanguage Locale locale           if  locale    null              return LocaleLanguage ENGLISH           for  LocaleLanguage localeLanguage   LocaleLanguage values                 if  localeLanguage getLocale   getLanguage   equals locale getLanguage                     return localeLanguage                     return null

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Finally you are getting a char array with alphabet  Why did you do so hard way using a loop    It is just  char   alphabet new char    a   b             z

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Check this once I m sure you will get a to z alphabets   for  char c    a   c  lt    z   c          al add c     System out println al

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Simplicity is a virtue  Use this naturally readable array  char alphabet       a    b    c    d    e    f    g    h    i    j    k    l    m    n    o    p    q    r    s    t    u    v    w    x    y    z

[java] Better way to generate array of all letters in the alphabet

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