This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
Despite appearances, a package x.y is not, in any meaningful sense, "part of" a package x. "import x" imports only classes directly in package "x", not those in "x.y". Since there actually are no classes in the "java" package, the answer is no, "import java.*" does nothing useful.