Java: Searching for a Regex that splits a text into separate words, including letters, numbers and ' between letters

If you want to match words using \w, instead of using split you can use word boundaries and assert not ' at the left and at the right.

\b(?<!')\w+(?:'\w+)*\b(?!')

In Java

String regex = "\\b(?<!')\\w+(?:'\\w+)*\\b(?!')";
String string = "Can't but not something like: 'HEART'";

Pattern pattern = Pattern.compile(regex);
Matcher matcher = pattern.matcher(string);

while (matcher.find()) {
    System.out.println(matcher.group(0));
}

Output

Can't
but
not
something
like

Java: Searching for a Regex that splits a text into separate words, including letters, numbers and ' between letters

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