if( i < len && data[i] == '.' ) {
                    dots++;
                    i++;
                }
            }
        }

        return false;
    }

    static boolean isAllDigits( String hostname ) {
        for (int i = 0; i < hostname.length(); i++) {
            if (Character.isDigit( hostname.charAt( i )) == false) {
                return false;
            }
        }

        try {
            thread.join();
        }
        catch ( InterruptedException e ) {
            e.printStackTrace();
        }
    }


    private static boolean isAllDigits ( String hostname ) {
        for ( int i = 0; i < hostname.length(); i++ ) {
            if ( Character.isDigit(hostname.charAt(i)) == false ) {
                return false;
            }
        }