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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

Declaring and initializing arrays

There are different ways to declare and initialize arrays in Java. What you’ll need will depend a lot on the specific situation. So, let’s just start with the basics of declaring arrays.

Declaring arrays

To declare an array in Java, you need to specify the data type of the elements, followed by square brackets ([]) and the array’s name. Take the following example:

int[] ages;

Here, int[] is the data type of the array, and ages is the name of the array. Right now, we can’t add any values to the array, because it hasn’t been initialized yet. This is different from initializing variables, which we have seen so far. Let’s see how to initialize arrays next.

Initializing arrays

After declaring an array, it needs to be initialized. We do this by specifying its size and allocating memory for the elements. We can use the new keyword to do this, followed by the data type, and then specify the size of...

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