Java Coding Problems, Second Edition

Modern Java keeps expanding, and knowing a feature’s syntax is only part of the work: the harder question is when—and why—to use it. Java Coding Problems, Second Edition takes that practical question as its starting point, using more than 200 problems and solutions to explore contemporary Java concepts and everyday programming challenges.

Practice Java through real programming questions

Anghel Leonard organizes the material by topic, moving through areas such as strings and text blocks, numbers, dates, objects, immutability, switch expressions, pattern matching, records, collections, data structures, and functional programming. The problem-and-solution format gives readers a chance to test an idea before examining an approach and its reasoning.

Make sense of newer Java features

The book engages with features introduced across recent JDK releases, including records, record patterns, sealed classes, and updates to Java’s functional APIs. It also covers subjects such as serialization, networking, and garbage collection. Examples connect language features to concrete tasks, helping readers consider how a solution works in context.

Compare approaches, not just answers

A useful thread throughout the book is the attention to trade-offs. Newer syntax is not presented as automatically preferable; readability, performance, and complexity all matter when choosing how to solve a problem. That perspective makes the collection useful for sharpening judgment as well as refreshing technical knowledge.

For developers with Java experience

This second edition is aimed at readers who already have working knowledge of Java and want structured practice across a wide range of the language. It can serve as a topic-by-topic study companion or a reference to return to when a particular feature or programming challenge calls for a closer look.

For Java developers who learn best by trying a problem, studying a solution, and weighing the alternatives, this collection offers plenty to work through.