Split string into array of character strings

Question

I need to split a String into an array of single character Strings.

Eg, splitting "cat" would give the array "c", "a", "t"

Answer 1

Maybe you can use a for loop that goes through the String content and extract characters by characters using the charAt method.

Combined with an ArrayList<String> for example you can get your array of individual characters.

Answer 2

If characters beyond Basic Multilingual Plane are expected on input (some CJK characters, new emoji...), approaches such as "a

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Answer 3

Take a look at the String class's getChars() method.

Answer 4

If the original string contains supplementary Unicode characters, then split() would not work, as it splits these characters into surrogate pairs. To correctly handle these special characters, a code like this works:

String[] chars = new String[stringToSplit.codePointCount(0, stringToSplit.length())];
for (int i = 0, j = 0; i < stringToSplit.length(); j++) {
    int cp = stringToSplit.codePointAt(i);
    char c[] = Character.toChars(cp);
    chars[j] = new String(c);
    i += Character.charCount(cp);
}

Answer 5

for(int i=0;i<str.length();i++)
{
System.out.println(str.charAt(i));
}

Answer 6

To sum up the other answers...

This works on all Java versions:

"cat".split("(?!^)")

This only works on Java 8 and up:

"cat".split("")