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How to create an array of characters in Java without a specified length?

    char ret[] = {};

Doesn't work, seems to work, and I'm not sure what the best way to do this.

Any help would be greatly appreciated.

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9 answers

You are probably looking ArrayList<Character>.

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Arrays must have a fixed length.

If your goal is to have a dynamically expandable list, consider List. Each time you add an element by a method add(), it will grow dynamically when necessary.

List<Character> chars = new ArrayList<Character>();
// ...

See also:

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char[] ret = new char[0];

. , .

, , ArrayList<Character>

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0, ?

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char Character char - StringBuilder. char . , getChars() char [].

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:

char[] ret = {};
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; . , ?

char[] ret = null;

, null. .

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Thinks you are still thinking in C or Pascal. The functionality you want is probably a Java String. char[]rare in Java. (You can iterate over the characters of a string with charAt, among other possibilities.)

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You probably came from PHP or another programming language that has no real arrays. (An array in PHP is a kind of dictionary / hashmap)

Arrays in JAVA are fixed length.

Without a fixed length, you can use Vector. If you want to index something else besides integers from 0 to length, you can use a dictionary.

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