Java in One Month
Solid working Java on a four week plan
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What's inside
- A paced four week plan through all of Java
- Practice drills at the end of every section
- Two guided mini projects to make the ideas stick
- More worked examples and edge cases than the crash notes
What's covered
- 1 · Records & sealed types A record is an immutable data carrier, you name the data, the compiler writes the boilerplate.
- 2 · Pattern matching & switch A pattern tests a type and binds a variable in one move, no cast, no ceremony.
- 3 · Generics bounds, wildcards & PECS
- 4 · Collections deep dive Two roots: Collection (a bag of elements) and Map (key→value), Map is not a Collection.
- 5 · Streams & collectors A stream is a one-shot pipeline over a source, not a collection. Build it lazily, then pull once with a terminal op.
- 6 · Functional interfaces & method refs A @FunctionalInterface has exactly one abstract method, so a lambda or method reference fits its shape.
- 7 · equals, hashCode & ordering Equality is logical, not identity, equal objects must return equal hashCodes , always.
- 8 · Exceptions best practices
- 9 · The java.time API Pick the type by how much truth it carries, a machine instant, a wall clock with no zone, or a zone-aware moment.
- 10 · Concurrency threads & executors
- 11 · Optional & null-safety Optional<T> is a box holding zero or one value, a typed replacement for a null return.
- 12 · Build tools Maven & Gradle
- 13 · Testing JUnit 5 & Mockito
- 14 · Project Thread-Safe Cache
- 15 · Project Stream Data Pipeline
- 16 · Cheat sheet The working-knowledge tier on two pages, scan, don't read.
Java in One Month turns the crash notes into a paced four week plan. You get solid working Java with practice drills and two mini projects, so the ideas move from “I read it” to “I can build it”.
This book respects your time. No filler and no padding, just the parts that matter, in a handwritten style that is genuinely nice to read.
Preview a few pages below, then grab the PDF. It will be in your inbox in seconds.
Questions
How is this different from the One Week edition?
Same voice and design with more depth. A paced plan, practice drills, and two mini projects so the ideas actually stick.
What format is the book?
A print ready PDF in the same handwritten Classic Ruled style. Read it on any device or print it.
Do I need an account to buy?
No. Buy with just your email and the download link arrives instantly. You can make an account later and grab it again anytime.
Can I get a refund?
Yes. See our refund policy, and if the book is not for you, just reach out.