A free program for Android, by CP Abdelhady.

Enjoy learning about Java with this wonderful collection of guides for JAVA.

Learn java in your own pace with this wonderfully useful app. In this app you can get several programming concepts, tips and tricks, and programming necessaries with this simple to use app. Learn arrays,  language basics, variables, primitive data types, and more with this simple app.

Keep on learning with this wonderful app. This app can be used offline so you can learn and read without an internet connection. The pdfs are arranged into clear trails to better promote learning. Bring the programming king in you with this simple to use app.