Learning Path

The fastest route from no technical experience to a full-stack, frontend or backend engineering role. It interleaves what the job needs with what the interview needs, in the order to learn them.

Roadmap 2 of 6

Java Basics & Interviews

Java is a prolific, invaluable language for backend development, and an excellent primary backend language to master. This roadmap covers the language basics you need for Java development, and for the Java interviews you may face.

Stage 1
Java language basics
Set up Java
What is Java?
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Install Java
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Your first Java program
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Beginner Java
Use both to complement each other.
Video
One long video
Watch it start to finish
Beginner Java
link
Reading
Dev.java tutorials
Read in this order
Language basics
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Object-oriented programming
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Generics, lambdas and pattern matching
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Annotations and exceptions
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Collections and streams
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Managing out-of-memory data
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Dates and regular expressions
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Reflection and method handles
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Java concurrency
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Java concurrency utils
Only BlockingQueue, ConcurrentMap, Semaphore, ExecutorService, Callable, Future, ForkJoinPool and AtomicInteger.
linkCompletableFuture
Pass-by
Then learn how Java passes values into methods.
Pass-by in Java
link
Stage 2
Object-oriented design patterns
You don’t need to know every pattern and principle in existence. What the Mastering SWE Object Oriented Design module covers is enough.
Learn the concepts in depth
Use either resource to learn each concept properly.
Low-level design principles
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Design patterns
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Object Oriented Design deck
Then engrain what you learned with the module. It’s simple and concise, so you can even learn with it to begin with.
Stage 3
Mastering SWE Java module
Helps you pass any knowledge rounds on Java. It also helps in technical interviews that expect you to read or write code, AI-generated code included, especially in an object-oriented style or using more advanced topics such as concurrency.
Java deck
Stage 4
Mastering SWE Java coding interview module
Engrains the exact language features and syntax you need to pass data structures and algorithms interviews in Java, or low-level and object-oriented design coding interviews. These come up in online assessments or technical rounds, depending on the company.
Java coding interviews deck

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Java Basics & Interviews

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Read in this order