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

Understanding exceptions

In everyday life, we have to execute a lot of processes. And all the time, we have little hiccups that happen, and these should not ruin our day. These hiccups are not considered the happy path of events, but they happen often, and we recover from them and continue business as usual.

There are also more serious problems that can occur, for which we need to have a formal backup plan, such as evacuating a building in case of a fire.

Exceptions in Java are like this. These are things that should not happen; sometimes, we are in control of them happening and sometimes, we are not. In some cases, we are obligated to specify a backup plan, and in other cases, we are not. First, let’s talk a bit more about what exceptions are.

What are exceptions?

Exceptions are events that disrupt the normal flow of the program. They typically arise from errors or unexpected conditions that the program encounters while running. Exceptions in Java are objects. These...