How can I initialize a String array with length 0 in Java

Question

The Java Docs for the method String   java io File list FilenameFilter filter  includes this in the returns description      The array will be empty if the directory is empty or if no names were accepted by the filter    How do I do a similar thing and initialize a String array  or any other array for that matter  to have a length 0

User · Answer

Ok I actually found the answer but thought I would  import  the question into SO anyway  String   files   new String 0   or int   files   new int 0

User · Answer

String   str         But  return       won t work as the type information is missing

User · Answer

You can use ArrayUtils EMPTY STRING ARRAY from org apache commons lang3  import org apache commons lang3 ArrayUtils       class Scratch           public static void main String   args                String   strings   ArrayUtils EMPTY STRING ARRAY

User · Answer

String   str   new String 0

User · Answer

Make a function which will not return null instead return an empty array you can go through below code to understand        public static String   getJavaFileNameList File inputDir        String   files   inputDir list new FilenameFilter              Override         public boolean accept File current  String name                return new File current  name  isFile    amp  amp   name endsWith  java                            return files    null   new String 0    files

User · Answer

As others have said   new String 0    will indeed create an empty array  However  there s one nice thing about arrays - their size can t change  so you can always use the same empty array reference  So in your code  you can use   private static final String   EMPTY ARRAY   new String 0     and then just return EMPTY ARRAY each time you need it - there s no need to create a new object each time

[java] How can I initialize a String array with length 0 in Java?

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