Book Image

Design Patterns and Best Practices in Java

By : Kamalmeet Singh, Adrian Ianculescu, Lucian-Paul Torje
Book Image

Design Patterns and Best Practices in Java

By: Kamalmeet Singh, Adrian Ianculescu, Lucian-Paul Torje

Overview of this book

Having a knowledge of design patterns enables you, as a developer, to improve your code base, promote code reuse, and make the architecture more robust. As languages evolve, new features take time to fully understand before they are adopted en masse. The mission of this book is to ease the adoption of the latest trends and provide good practices for programmers. We focus on showing you the practical aspects of smarter coding in Java. We'll start off by going over object-oriented (OOP) and functional programming (FP) paradigms, moving on to describe the most frequently used design patterns in their classical format and explain how Java’s functional programming features are changing them. You will learn to enhance implementations by mixing OOP and FP, and finally get to know about the reactive programming model, where FP and OOP are used in conjunction with a view to writing better code. Gradually, the book will show you the latest trends in architecture, moving from MVC to microservices and serverless architecture. We will finish off by highlighting the new Java features and best practices. By the end of the book, you will be able to efficiently address common problems faced while developing applications and be comfortable working on scalable and maintainable projects of any size.
Table of Contents (15 chapters)
Title Page
Packt Upsell
Contributors
Preface
Index

Best practices and new features of Java 10


Java 10 is the latest and current version for Java. Like previous versions, this too brings in some interesting feature additions to the language. Some features we will be able to interact with directly when we code, but there are other improvements that work behind the scenes, such as improved garbage collection, which improves the overall experience of users. In this section, we will discuss some of the important features added by Java 10.

Local variable type inference

This is probably the biggest change in Java 10 that will impact the way you used to code. Java is always known as a strict type language. Well, it still is, but with Java 10 you have the liberty of using var when declaring local variables instead of providing proper type.

Here is an example:

public static void main(String s[]) 
{
  var num = 10;
  var str = "This is a String";
  var dbl = 10.01;
  var lst = new ArrayList<Integer>();
  System.out.println("num:"+num);
  System.out...