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.
If you want help, the first step is to tell people here what is wrong. Most people here will try to be helpful but unfortunately your question is far to vague to even begin guessing what the problem might be. An absolute requirement of any "something's not working" post like this is you post the error message you are seeing.