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In arenas ranging from enterprise development to Android app programming to game development, Java remains one of the world's most popular programming languages. Sams Teach Yourself Java in 24 Hours helps Java beginners gain true mastery over the new Java 9. In this book's straightforward, step-by-step approach, each lesson builds on everything that's come before, helping readers learn Java's core features and techniques from the ground up. Friendly, accessible, and conversational, this book offers a practical grounding in the language, without ever becoming overwhelming or intimidating. Coverage includes: learning programming basics; working with data and objects; programming graphical user interfaces; creating interactive web programs; handling errors; writing Internet and mobile apps; and much more.