public class Shortener {
    private Map<String, String> shortningRules;

    /*
     * Default constructor that will load a default abbreviations text file.
     */
    public Shortener(FileReader reader) {
        this.shortningRules = new HashMap<>();
        parseInput(reader);
    }

    public Shortener(Map<String, String> shortningRules) {
        this.shortningRules = shortningRules;
    }

    private void parseInput(FileReader reader) {
        try (BufferedReader br = new BufferedReader(reader)) {
            String line;
            while ((line = br.readLine()) != null) {
                String[] lineComponents = line.split(",");
                this.shortningRules.put(lineComponents[0], lineComponents[1]);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void shortenMessage(String message) {
        for (Entry<String, String> entry : shortningRules.entrySet()) {
            message = message.replaceAll("\\b" + entry.getKey() + "\\b", entry.getValue());
        }
        System.out.println(message);
    }

    public static void main(String[] args) {
        Map<String, String> rules = new HashMap<String, String>() {{
            put("hello", "lo");
            put("any", "ne");
            put("anyone", "ne1");
            put("thanks", "thx");
        }};
        Shortener shortener = new Shortener(rules);

        String msg = "hello? any anyone thanks!";
        shortener.shortenMessage(msg);
    }

}