string to string array conversion in java

Question

I have a string    name   I want to convert into a string array  How do I do it  Is there any java built in function  Manually I can do it but I m searching for a java built in function   I want an array where each character of the string will be a string  like char  n  will be now string  n  stored in an array

User · Answer

here is have convert simple string to string array using split method.

String [] stringArray="My Name is ABC".split(" ");

Output

stringArray[0]="My";
stringArray[1]="Name";
stringArray[2]="is";
stringArray[3]="ABC";

User · Answer

Assuming you really want an array of single-character strings  not a char   or Character     1  Using a regex   public static String   singleChars String s        return s split               The zero width negative lookahead prevents the pattern matching at the start of the input  so you don t get a leading empty string   2  Using Guava   import java util List   import org apache commons lang ArrayUtils   import com google common base Functions  import com google common collect Lists  import com google common primitives Chars           public static String   singleChars String s        return         Lists transform Chars asList s toCharArray                             Functions toStringFunction                  toArray ArrayUtils EMPTY STRING ARRAY

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Splitting an empty string with String split   returns a single element array containing an empty string  In most cases you d probably prefer to get an empty array  or a null if you passed in a null  which is exactly what you get with org apache commons lang3 StringUtils split str    import org apache commons lang3 StringUtils   StringUtils split null          gt  null StringUtils split               gt     StringUtils split  abc def      gt    abc    def   StringUtils split  abc  def     gt    abc    def   StringUtils split   abc         gt    abc     Another option is google guava Splitter split   and Splitter splitToList   which return an iterator and a list correspondingly  Unlike the apache version Splitter will throw an NPE on null   import com google common base Splitter   Splitter SPLITTER   Splitter on      trimResults   omitEmptyStrings     SPLITTER split  a b    c                 gt    a  b  c  SPLITTER split                           gt      SPLITTER split                           gt      SPLITTER split null                      gt   NullPointerException   If you want a list rather than an iterator then use Splitter splitToList

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Based on the title of this question  I came here wanting to convert a String into an array of substrings divided by some delimiter  I will add that answer here for others who may have the same question   This makes an array of words by splitting the string at every space   String str    string to string array conversion in java   String delimiter        String strArray     str split delimiter     This creates the following array       string  to  string  array  conversion  in  java    Source  Tested in Java 8

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String strName    name   String   strArray   new String    strName   System out println strArray 0      prints  name    The second line allocates a String array with the length of 1  Note that you don t need to specify a length yourself  such as   String   strArray   new String 1     instead  the length is determined by the number of elements in the initalizer  Using  String   strArray   new String    strName   name1    name2      creates an array with a length of 3

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Simply use the  toCharArray   method in Java  String k    quot abc quot   char   alpha   k toCharArray     This should work just fine in Java 8

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String array   array of characters     Or do you have a string with multiple words each of which should be an array element    String   array   yourString split wordSeparator

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I guess there is simply no need for it  as it won t get more simple than  String   array     name      Of course if you insist  you could write   static String   convert String    array       return array     String   array   convert  name   age   hobby        Edit  If you want single-letter Strings  you can use   String   s    name  split        Unfortunately s 0  will be empty  but after this the letters n a m e will follow  If this is a problem  you can use e g  System arrayCopy in order to get rid of the first array entry

User · Answer

Convert it to type Char   http   www javadb com convert-string-to-character-array

User · Answer

lt pre gt     MyUtils splitString2SingleAlphaArray null        null    MyUtils splitString2SingleAlphaArray  momdad          m o m d a d      lt  pre gt      param str  the String to parse  may be null     return an array of parsed Strings    code null  if null String input     public static String   splitString2SingleAlphaArray String s       if  s    null           return null      char   c   s toCharArray        String   sArray   new String c length       for  int i   0  i  lt  c length  i              sArray i    String valueOf c i              return sArray      Method String split will generate empty 1st  you have to remove it from the array  It s boring

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In java 8  there is a method with which you can do this  toCharArray     String k    abcdef   char   x   k toCharArray      This results to the following array    a b c d e f

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You could use string chars   mapToObj e - gt  new String new char    e      though this is quite lengthy and only works with java 8  Here are a few more methods   string split       Has an extra whitespace character at the beginning of the array if used before Java 8  string split       string split           Arrays toString string toCharArray    substring 1  string length     3   1  split         The last one is just unnecessarily long  it s just for fun

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An additional method   As was already mentioned  you could convert the original String  name  to a char array quite easily   String originalString    name   char   charArray   originalString toCharArray      To continue this train of thought  you could then convert the char array to a String array   String   stringArray   new String charArray length   for  int i   0  i  lt  charArray length  i         stringArray i    String valueOf charArray i        At this point  your stringArray will be filled with the original values from your original string  name   For example  now calling  System out println stringArray 0      Will return the value  n   as a String  in this case

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To start you off on your assignment  String split splits strings on a regular expression and this expression may be an empty string  String   ary    quot abc quot  split  quot  quot     Yields the array   java lang String       a  b  c   Getting rid of the empty 1st entry is left as an exercise for the reader  -  Note  In Java 8  the empty first element is no longer included

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String data    abc   String   arr   explode data    public String   explode String s        String   arr   new String s length       for int i   0  i  lt  s length  i                  arr i    String valueOf s charAt i              return arr

[java] string to string array conversion in java

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