This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
If you change a method to static it still represents overloading, yes. You still have to make sure that the parameters are different types.
Yes, you can overload a method in a subclass, but it is probably not a good idea. Common mistake:This will compile and run, but many classes in the API will expect the equals method to be overridden not overloaded, so classes will look for a public boolean equals(Object o) method and may give incorrect or inapporpriate results.