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

Java Core API

In this chapter, we will delve more deeply into popular classes and interfaces from the Java API. We will start with the Scanner class, which is commonly used for scanning and parsing text from sources such as the keyboard (the user). We will then examine the very popular String and StringBuilder classes. We will discuss their differences, which will require contrasting mutable and immutable types. We will also show you how to design immutable types and look at the List interface and its popular implementation class, ArrayList. Lastly, we will examine the Date API, which was overhauled in Java 8.

For further details on the types covered in this chapter, please refer to the Java Docs API: https://docs.oracle.com/en/java/javase/21/docs/api/index.html.

This chapter covers the following main topics:

  • Understanding the Scanner class
  • Comparing String with StringBuilder
  • Designing an immutable type
  • Examining List and ArrayList
  • Exploring the Date API...