opd4

 String input = taInput.getText().replaceAll("[-+.^:,]","").toLowerCase();

        input = input.replaceAll("\n", " SPACE ");
        input = input.replaceAll("  ", " ");

        String ss = "";

        String[] woorden = input.split(" ");
        ArrayList<String> lijst = new ArrayList<String>();

        Collections.addAll(lijst, woorden);
        TreeMap<String,ArrayList<Integer>> t = new TreeMap();

        int counter = 1;

        for (String s : woorden)
        {
            if (!s.equals("SPACE"))
            {
                if (t.get(s)==null)
                {
                    t.put(s, new ArrayList<Integer>());
                    if (!t.get(s).contains(counter))
                    t.get(s).add(counter);
                }
                else
                    t.get(s).add(counter);
            }
            else
                counter++;
        }

        String output = "";
        for (Map.Entry<String,ArrayList<Integer>> entry : t.entrySet())
        {
            String concordantie = "[";
            ArrayList<Integer> added = new ArrayList<>();
            for (int getal : entry.getValue())
            {
                if (!added.contains(getal))
                concordantie = concordantie + getal + ",";
                added.add(getal);
            }
            concordantie = concordantie.substring(0, concordantie.length()-1)+"]";
            output = output + entry.getKey() + " " + concordantie + "\n";
        }

        taInput.setText(output);