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  • Book Overview & Buying Learn Java with Projects
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Learn Java with Projects

Learn Java with Projects

By : Dr. Seán Kennedy, Maaike van Putten
4.9 (48)
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Learn Java with Projects

Learn Java with Projects

4.9 (48)
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

Explaining ‘private’ interface methods

Interfaces can also have private methods with code implementations. They were introduced to reduce code duplication and improve encapsulation. These private methods can be both static and non-static. As they are private, they can only be accessed from within the interface. As with classes, you cannot access a non-static method from a static method.

Let’s have a look at an example in code. Firstly, we will examine code that has code duplication. Figure 10.8 shows such an interface:

Figure 10.8 – An interface with code duplication

Figure 10.8 – An interface with code duplication

As this figure shows, lines 6, 11, and 16 are the same. In addition, lines 8, 13, and 18 are also the same. We will refactor this interface to address this code duplication by using private methods. Figure 10.9 shows the code for this:

Figure 10.9 – An interface with private methods

Figure 10.9 – An interface with private methods

In this figure, we have a private static...

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Learn Java with Projects
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