Hello. Began to learn Java recently, for this I can not cope. Help make a regular expression, which will need to be compared with a string, and check if there is a match with (Number1 + Number2). If there is - pull out these numbers. Thank you in advance!

    1 answer 1

    You can try this:

    public static void checkWithRegExp(String str){ Pattern p = Pattern.compile("^(\\d+)\\+(\\d+)$"); Matcher m = p.matcher(str); if (m.find()) { System.out.println("Совпадение обнаружено!"); for(int i = 1; i <= m.groupCount(); i++) { System.out.println("Число: " + m.group(i)); } } else { System.out.println("Совпадений не обнаружено!"); } } public static void main(String[] args) { checkWithRegExp("3+2342"); }

    In the case of the parameter "3+2342" output will be

    A match is found!

    Number: 3

    Number: 2342

    in the case of "31230+" output will be

    No matches found!

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