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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

Accessing elements in an array

In order to access elements in an array, we need to use their index. The index represents the position in the array. This allows us to retrieve the value at a certain position and assign it a new value. Let’s first talk about indexing.

Understanding indexing

In Java, arrays use zero-based indexing, which means the first element has an index of 0, the second element has an index of 1, and so on. Take a look at our example of the ages array:

int[] ages = {31, 7, 5, 1, 0};

This means that the first element (31) has an index of 0 and the last element has an index of 4.

Figure 6.1 – Indexing explained with the ages array

Figure 6.1 – Indexing explained with the ages array

We count the length of an array like we normally do, starting with 1. So, the length of this array would be 5. The last element in the array has an index equal to the array’s length minus 1. For an array with a length of N, the valid indexes are in the range of 0 to N-1.

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Learn Java with Projects
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