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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

Understanding lambda expressions

Lambda expressions save on keystrokes and therefore make your code more concise and hence, more readable and maintainable. For this to work, the compiler has to be able to generate the code that you no longer type in. This brings us to our first topic: functional interfaces. To understand lambdas, we must first understand functional interfaces.

Functional Interfaces

Recall that an interface has default, static, private, and abstract methods. A concrete (non-abstract) class that implements an interface must provide code for all of the abstract methods. A functional interface is an interface with just one abstract methoddefault, static, and private methods do not count. Neither do any methods inherited from Object. This one abstract method is known as the functional method.

Lambda expressions

A lambda expression is an instance of a class that implements a functional interface. The lambda is boiled down to its bare essentials. Lambdas...

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