Java character array initializer

Question

I tried to make a program that separates characters   The question is     Create a char array and use an array initializer to initialize the array with the characters in the string  Hi there   Display the contents of the array using a for-statement  Separate each character in the array with a space      The program I made    String ini    Hi there   char   array   new char ini length      for int count 0 count lt array length count         System out print     array count        What should I do to fix this problem

User · Accepted Answer

Here s how you convert a String to a char array   String str    someString    char   charArray   str toCharArray      I d recommend that you use an IDE when programming  to easily see which methods a class contains  in this case you d be able to find toCharArray    and compile errors like the one you have above  You should also familiarize yourself with the documentation  which in this case would be this String documentation    Also  always post which compile errors you re getting  In this case it was easy to spot  but when it isn t you won t be able to get any answers if you don t include it in the post

User · Answer

you are doing it wrong  you have first split the string using space as a delimiter using String split   and populate the char array with charcters    or even simpler just use String charAt   in the loop to populate array like below   String ini  Hi there     char   array new  char ini length        for int count 0 count lt array length count              array count    ini charAt count     System out print     array count          or one liner would be    String ini  Hi there     char   array ini toCharArray

User · Answer

Instead of above way u can achieve the solution simply by following method    public static void main String args          String ini    Hi there       for  int i   0  i  lt  ini length    i              System out print       ini charAt i

User · Answer

You initialized and declared your String to  quot Hi there quot   initialized your char   array with the correct size  and you began a loop over the length of the array which prints an empty string combined with a given element being looked at in the array  At which point did you factor in the functionality to put in the characters from the String into the array  When you attempt to print each element in the array  you print an empty String  since you re adding  nothing  to an empty String  and since there was no functionality to add in the characters from the input String to the array  You have everything around it correctly implemented  though  This is the code that should go after you initialize the array  but before the for-loop that iterates over the array to print out the elements  for  int count   0  count  lt  ini length    count        array count    ini charAt count      It would be more efficient to just combine the for-loops to print each character out right after you put it into the array  for  int count   0  count  lt  ini length    count        array count    ini charAt count     System out println array count       At this point  you re probably wondering why even put it in a char   when I can just print them using the reference to the String object ini itself  String ini    quot Hi there quot    for  int count   0  count  lt  ini length    count         System out println ini charAt count       Definitely read about Java Strings  They re fascinating and work pretty well  in my opinion  Here s a decent link  https   www javatpoint com java-string String ini    quot Hi there quot      stored in String constant pool  is stored differently in memory than String ini   new String  quot Hi there quot       stored in heap memory and String constant pool    which is stored differently than char   inichar   new char    quot H quot    quot i quot    quot   quot    quot t quot    quot h quot    quot e quot    quot r quot    quot e quot    String ini   new String inichar      converts from char array to string

User · Answer

Here is the code  String str    Hi There   char   arr   str toCharArray     for int i 0 i lt arr length i        System out print     arr i

User · Answer

char array     new String  Hi there   toCharArray    for char c   array      System out print c

[java] Java character array initializer

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