This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
because the compiler knows that an instance of a Ticker cannot possibly be a string - it can see that String extends Object and Ticker extends Component which itself extends Object. so a Ticker can not be an instance of String.