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

Thread management – sleep() and join()

This might be a weird statement, but threads can go to sleep. This means that the execution of the thread gets paused for a short while. Before we dive into how to do this, it is worth noting that this is something that is often considered to be a code smell. This means that it can be a problematic solution to, for example, a data race or a challenge with loading times. However, sometimes you will need this – for example, to slow down a background thread. Just make sure to proceed with caution here. Let’s see how we can make our threads go to sleep now.

The Thread.sleep() method

The Thread.sleep() method is a static method that causes the currently executing thread to go to sleep. That means pausing its execution for a specified period. It is useful for simulating delays, allowing other threads to execute, or performing time-based operations. The sleep() method takes a single argument, the duration of the sleep in milliseconds...