Question

Suppose I have a String message:

“you should upload file.zip to http://google.com/extremelylonglink.zip, not https://stackoverflow.com/extremelylonglink.zip. try again.”

I want a function to return to String newmessage:

“you should upload file.zip to [shorted version of first link], not [shortened version of second link]. try again.”

I already have the code for the URL shortener, and here is my URL detection code that replaces the first URL in a message:

        if(message.contains("http://") || message.contains("https://")) {
            String regex = "(?i)\\b((?:https?://|www\\d{0,3}[.]|[a-z0-9.\\-]+[.][a-z]{2,4}/)(?:[^\\s()<>]+|\\(([^\\s()<>]+|(\\([^\\s()<>]+\\)))*\\))+(?:\\(([^\\s()<>]+|(\\([^\\s()<>]+\\)))*\\)|[^\\s`!()\\[\\]{};:'\".,<>?«»“”‘’]))";
            Matcher m = Pattern.compile(regex).matcher(message);
            if (m.find()) {
                String url = m.group();
                    String shorted = null;      
                        try {       
                             shorted = Shortener.GetShortedISGD(url);                                                                           
                        } catch (IOException e1) {
                            // TODO Auto-generated catch block
                        }
                    }
                    String intercepted = message.replace(url, shorted);
                    e.setMessage(intercepted);
        }

How would I go about replacing ALL of them?
(I’m using the Bukkit API for a lot of this, so a lot of the functions aren’t in Java).

I’m thinking of splitting up message into an array of words, and then evaluating if each word would be a URL, except that would be kinda not optimized.

Answer 1

Use appendReplacement and appendTail. See example in the Java tutorial and another example closer to what you are trying to do.