Book Image

Java Coding Problems

By : Anghel Leonard
Book Image

Java Coding Problems

By: Anghel Leonard

Overview of this book

The super-fast evolution of the JDK between versions 8 and 12 has increased the learning curve of modern Java, therefore has increased the time needed for placing developers in the Plateau of Productivity. Its new features and concepts can be adopted to solve a variety of modern-day problems. This book enables you to adopt an objective approach to common problems by explaining the correct practices and decisions with respect to complexity, performance, readability, and more. Java Coding Problems will help you complete your daily tasks and meet deadlines. You can count on the 300+ applications containing 1,000+ examples in this book to cover the common and fundamental areas of interest: strings, numbers, arrays, collections, data structures, date and time, immutability, type inference, Optional, Java I/O, Java Reflection, functional programming, concurrency and the HTTP Client API. Put your skills on steroids with problems that have been carefully crafted to highlight and cover the core knowledge that is accessed in daily work. In other words (no matter if your task is easy, medium or complex) having this knowledge under your tool belt is a must, not an option. By the end of this book, you will have gained a strong understanding of Java concepts and have the confidence to develop and choose the right solutions to your problems.
Table of Contents (15 chapters)
Free Chapter
Strings, Numbers, and Math
Objects, Immutability, and Switch Expressions
Working with Date and Time
Arrays, Collections, and Data Structures
Java I/O Paths, Files, Buffers, Scanning, and Formatting
Java Reflection Classes, Interfaces, Constructors, Methods, and Fields
Functional Style Programming - Fundamentals and Design Patterns
Functional Style Programming - a Deep Dive
Concurrency - Thread Pools, Callables, and Synchronizers
Concurrency - Deep Dive
The HTTP Client and WebSocket APIs

Functional Style Programming - a Deep Dive

This chapter includes 22 problems that involve Java functional-style programming. Here, we will focus on several problems that involve classical operations that are encountered in streams (such as, filter and map), and discuss infinite streams, null-safe streams, and default methods. This comprehensive list of problems will cover grouping, partitioning, and collectors, including the JDK 12 teeing() collector and writing a custom collector. In addition, takeWhile(), dropWhile(), composing functions, predicates and comparators, testing and debugging lambdas, and other cool topics will be discussed as well.

Once you've covered this and the previous chapter, you will be ready to unleash functional-style programming on your production applications. The following problems will prepare you for a wide range of use cases, including corner...