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

Exercises

Let’s deal with some common unhappy path scenarios in our app. When these occur, we need our app to be able to recover from them:

  1. When reading and writing the dinosaur data, it is possible that the file cannot be opened due to different circumstances. Perhaps someone moved it, it’s in use, or something else. Your task is to simulate a situation where you’re trying to read from a file (that may not exist) and deal with the checked exception.
  2. While updating dinosaur data, invalid values could sometimes be provided. Write an updateDinosaurWeight method that takes a weight value and a Dinosaur object. If the weight value is less than zero, the method should throw IllegalArgumentException. Use a try-catch block to handle this exception. The handling can be a simple System.out.println for now.
  3. Even in exceptional circumstances, certain operations should always execute. For example, a daily audit of dinosaurs’ health should happen, whether...