How to get all matched parts to regex pattern

Question

I have to parse a String in 3 stages. Only first stage works, in 2 and 3 stage matcher.groupCount() returns 0 - which means it found nothing. I was testing my regex in online tester and it was just fine. But here it doesn't work. So the question is maybe I miss something or regex has mistake in it?

String rawText = "ashjdajsdg:[requiredPartForFirstPattern]}asdassdasd";
Pattern firstPattern = Pattern.compile("(:\\[)(.*?)(\\]})");
List<String> firstList = parseContent(rawText, firstPattern);

After execution firstList should contain only one value (in this case): "requiredPartForFirstPattern" (could be any char or any char sequence).

Now I am iterating all the values in the firstList and checking them with 2 pattern:

All values in firstList will have such form: "[someText1],[someText2],[someText3]".

String rawText = "[someText1],[someText2],[someText3]"; 
Pattern secondPattern = Pattern.compile("(\\[([^]]*)\\])");
List<String> secondList = parseContent(rawText, secondPattern);

After execution secondList should contain this values (in this case): "someText1","someText2","someText3".

And finally the third stage. I iterate all values in secondList and check them with 3 pattern. All values in secondList will have such form: "'someValue1','someValue2'".

String rawText = "'someValue1','someValue2'";
Pattern thirdPattern = Pattern.compile("('(.*?)')");
List<String> thirdList = parseContent(rawText, secondPattern);

After execution secondList should contain this values (in this case): "someValue1","someValue2".

My parseContent method:

    private List<String> parseContent(String content, Pattern pattern) {
        List<String> matchedList = new LinkedList<>();

        Matcher matcher = pattern.matcher(content);
        if (matcher.find()) {
            for(int matchIndex = 0; matchIndex < matcher.groupCount(); ++matchIndex) {
                matchedList.add(matcher.group(matchIndex));
            }
        }
        return matchedList;
    }

Answer 1

You should have while (matcher.find()) instead of an if-statement.

if (matcher.find()) {
    for(int matchIndex = 0; matchIndex < matcher.groupCount(); ++matchIndex) {
        matchedList.add(matcher.group(matchIndex));
    }
}

I've replaced above code with this one:

while (matcher.find()) {
    matchedList.add(matcher.group(1));
}

Works fine, ty for help.