public boolean find(String keyword){
        boolean ok = false;
        String toLowerCase = keyword.toLowerCase();
       
        try {
            
            BufferedReader  bufferedReader = new BufferedReader (new FileReader (id + ".txt"));
            //Buscar si existe una palabra
            String  line;
            while((line = bufferedReader.readLine())!=null && !ok){
                    if(line.toLowerCase().indexOf(toLowerCase)!= -1){
                           ok = true;
                    }
            }
            
        }
        catch(FileNotFoundException e) {
            e.printStackTrace();
        }
        catch(IOException e) {
            e.printStackTrace();
        }
        
        return ok;
    }