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The Java your degree taught, done right. One concept per chapter, Java 21, plain Java. Every chapter: the toy example you were taught, why it misled you, the real example, and what a senior writes. Runnable companion code included.

You can write a class. You passed the Java course. Then you opened a real codebase and nothing looked like the slides. This book closes that gap. It takes the concepts you already met, inheritance, interfaces, generics, exceptions, and rebuilds each one with an example you would actually recognize from production code.

Every chapter shows the toy you were taught, names why it misled you, and gives you the version a senior engineer would write. Short, direct, and built to be opened to the concept you need today.

By the end you will reach for composition before inheritance, use generics as a design tool, model with records and sealed types, read a stack trace top-down, and wire dependencies by hand so frameworks stop looking like magic.

It is the book a new Java engineer wishes someone had handed them on day one.

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Kick off your book project in 2 hours, get started with GhostAI in 2 hours, or do both! Free live workshops, on Zoom. You’ll leave with a real book project and a clear plan to keep going. Saturday, June 27, 2026.

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