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

Contrasting method overriding and method overloading

These two terms are often confused but in this section, we will compare and contrast both. We will show that concerning method overloading, the method signature must be different; whereas concerning method overriding, the method signature must be the same. Recall that the method signature consists of the method name and the parameter types, including their order. The return type and the parameter identifiers are not part of the method signature. So, for example, take the method from Figure 9.5:

public static void doAction(Vehicle v){…}

The signature is doAction(Vehicle).

With this in mind, we will initially discuss method overloading.

Method overloading

Recall that the method signature consists of the method name and the parameter types. Method overloading is where you have the same method name but the parameters differ, either in type and/or order. This means that the method signatures are different even though...