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Learn Java with Projects

Learn Java with Projects

By : Dr. Seán Kennedy, Maaike van Putten
4.9 (51)
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Learn Java with Projects

Learn Java with Projects

4.9 (51)
By: Dr. Seán Kennedy, Maaike van Putten

Overview of this book

Learn Java with Projects bridges the gap between introductory Java guides and verbose, theoretical references. This book is crafted to build a strong foundation in Java programming, starting from the Java environment itself. It goes far beyond a superficial review of the topics; it demonstrates, with practical examples, why these fundamentals are crucial for developing a deep understanding of the language. You'll not only learn about classes and objects but also see how these concepts are used in practical scenarios, enhancing your ability to write clean, efficient code. The engaging projects throughout the book provide real-world applications of complex topics, ensuring you can connect theoretical knowledge with practical skills. What makes this book stand out is the expertise of its authors. Seán, a seasoned university lecturer with over 20 years of experience, brings academic rigor and real-world insights, thanks to his work with a prestigious software company. Maaike, a passionate software developer and award-winning trainer, brings hands-on experience and a love for teaching. By the end of this book, you'll not only understand Java's core concepts and the critical advanced ones, but also gain practical experience through projects that mimic real-life challenges.
Table of Contents (22 chapters)
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1
Part 1: Java Fundamentals
9
Part 2: Object-Oriented Programming
15
Part 3: Advanced Topics

Examining intermediate operations

As we know, a stream pipeline consists of a source, followed by zero or more intermediate operations, followed by a terminal operation. While the terminal operation is mandatory, intermediate operations are not. That said, intermediate operations are where pipelines get their real power as they transform the stream data as it flows by. Unlike terminal operations, intermediate operations produce a stream as a result. Let us start with filter(), which is taken from IntermediateOperations.java on the repo:

filter(Predicate)

The filter() operation returns a stream containing the elements matching the given predicate. Figure 16.1 presents a code example (from IntermediateOperations.java on the repo):

Figure 16.1 - The filter(Predicate) intermediate operation in code

Figure 16.1 - The filter(Predicate) intermediate operation in code

In this figure, the countries whose names are longer than 5 characters are output.

distinct()

The distinct() operation returns a stream with duplicate...

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