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.
I think you can not have nested packages. But if you can do the following In folder \\com there are some classes. In folder \\com\abc there are some classes. In folder \\com\abc\xyz there are some classes. And you want to keep these classes in com,com.abc and com.abc.xyz package respectively. It can be done easily. Just compile these java files with corresponding package name in the corresponding folders and you get a package in a package. I hope this is what you are looking for. Girish