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.
In a properly written JDBC driver, Connection.close() will close any open Statement or ResultSet objects that were opened on that Connection, before closing the connection itself. ResultSet.close() will merely close the ResultSet, leaving open any Statement or Connection above it.