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 have a semi-colon at the end of your if statement, thus terminating the statement without doing anything. The subsequent "else if" is not associated with any if statement, and an error is generated.