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.
For a single insert, you would use executeUpdate(). Remember that the main difference between executeUpdate() and executeQuery() is what they return. You could use executeQuery() to run an insert but you would get back an empty ResultSet.