This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
You're asking for a code example for that question? Really? When you could have spent 30 seconds producing an example to ask about? Come on. Show us an example. And tell us what happened when you compiled it and what your question is about that.