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

  1. To keep the park running smoothly, we need to keep track of the health of all dinosaurs. We need to identify any ill dinosaurs. Using a stream of Dinosaur objects, filter out dinosaurs that are ill (assuming the isIll() method exists the in Dinosaur class), map them to their names, and collect the results in a list. Lastly, print out this list of names of the dinosaurs that need immediate attention.
  2. Managing a dinosaur park of this size involves handling large amounts of data. To make an announcement in the park about dinosaur feeding times, create a list of dinosaurs, convert it into a stream, and use the map() function to get a list of dinosaur names. Then, use the forEach terminal operation to print out a message for each dinosaur’s feeding time.
  3. Keeping track of the total food required for all the dinosaurs can be tricky. Suppose you have an array of weights of all dinosaurs. Convert it into an IntStream and use the sum method to get the total weight...