String fileName = "Document.txt";

        File file = new File(fileName);
        String para = "";


        int threePlus = 0;
        try{
            Scanner scan = new Scanner(file);
            while(scan.hasNextLine())
            {
                para+=scan.nextLine();
            }
        }catch(Exception e)
        {
            e.printStackTrace();
        }

        String words[] = para.split("\\s+");

        for(int i =0; i<words.length; i++)
        {
            words[i] = words[i].replace("[^\\w]"," ");
        }