Book Image

Learn Java with Projects

By : Dr. Seán Kennedy, Maaike van Putten
5 (3)
Book Image

Learn Java with Projects

5 (3)
By: Dr. Seán Kennedy, Maaike van Putten

Overview of this book

Learn Java with Projects stands out in the world of Java guides; while some books skim the surface and others get lost in too much detail, this one finds a nice middle ground. You’ll begin by exploring the fundamentals of Java, from its primitive data types through to loops and arrays. Next, you’ll move on to object-oriented programming (OOP), where you’ll get to grips with key topics such as classes, objects, encapsulation, inheritance, polymorphism, interfaces, and more. The chapters are designed in a way that focuses on topics that really matter in real-life work situations. No extra fluff here, so that you get more time to spend on the basics and form a solid foundation. As you make progress, you’ll learn advanced topics including generics, collections, lambda expressions, streams and concurrency. This book doesn't just talk about theory—it shows you how things work with little projects, which eventually add up to one big project that brings it all together. By the end of this Java book, you’ll have sound practical knowledge of Java and a helpful guide to walk you through the important parts of Java.
Table of Contents (22 chapters)
1
Part 1: Java Fundamentals
9
Part 2: Object-Oriented Programming
15
Part 3: Advanced Topics

Methods

In Chapter 6, we learned about arrays in Java. We learned that arrays are data structures that are fixed in size. They are stored in contiguous memory locations where each location is of the same type. We also saw how to declare, initialize, and process arrays. Both the traditional and enhanced for loops are ideal for processing arrays.

In addition, we discussed multi-dimensional arrays, including how they are organized and how to process them. Lastly, as arrays are very common, we discussed the Arrays class, which has several useful methods for processing arrays.

In this chapter, we will cover methods. Methods enable us to create a named block of code that can be executed from elsewhere in the code. Firstly, we will explain why methods are so commonplace. You will learn the difference between the method definition and the method invocation. We will explore what a method signature is and how method overloading enables methods to have the same name, without conflict. We...