Book Image

Learn Java 12 Programming

By : Nick Samoylov
Book Image

Learn Java 12 Programming

By: Nick Samoylov

Overview of this book

Java is one of the preferred languages among developers, used in everything right from smartphones, and game consoles to even supercomputers, and its new features simply add to the richness of the language. This book on Java programming begins by helping you learn how to install the Java Development Kit. You will then focus on understanding object-oriented programming (OOP), with exclusive insights into concepts like abstraction, encapsulation, inheritance, and polymorphism, which will help you when programming for real-world apps. Next, you’ll cover fundamental programming structures of Java such as data structures and algorithms that will serve as the building blocks for your apps. You will also delve into core programming topics that will assist you with error handling, debugging, and testing your apps. As you progress, you’ll move on to advanced topics such as Java libraries, database management, and network programming, which will hone your skills in building professional-grade apps. Further on, you’ll understand how to create a graphic user interface using JavaFX and learn to build scalable apps by taking advantage of reactive and functional programming. By the end of this book, you’ll not only be well versed with Java 10, 11, and 12, but also gain a perspective into the future of this language and software development in general.

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Table of Contents (25 chapters)
Preface
Preface
Who this book is for
What this book covers
To get the most out of this book
Get in touch
Free Chapter
1
Section 1: Overview of Java Programming
Section 1: Overview of Java Programming
2
Getting Started with Java 12
Getting Started with Java 12
How to install and run Java
How to install and run an IDE
Java primitive types and operators
String types and literals
Identifiers and variables
Java statements
Summary
Quiz
3
Java Object-Oriented Programming (OOP)
Java Object-Oriented Programming (OOP)
OOP concepts
Class
Interface
Overloading, overriding, and hiding
Final variable, method, and classes
Polymorphism in action
Summary
Quiz
4
Java Fundamentals
Java Fundamentals
Packages, importing, and access
Java reference types
Reserved and restricted keywords
Usage of the this and super keywords
Converting between primitive types
Converting between primitive and reference types
Summary
Quiz
5
Section 2: Building Blocks of Java
Section 2: Building Blocks of Java
6
Exception Handling
Exception Handling
Java exceptions framework
Checked and unchecked exceptions
The try, catch, and finally blocks
The throws statement
The throw statement
The assert statement
Best practices of exceptions handling
Summary
Quiz
7
Strings, Input/Output, and Files
Strings, Input/Output, and Files
Strings processing
I/O streams
File management
Apache Commons utilities FileUtils and IOUtils
Summary
Quiz
8
Data Structures, Generics, and Popular Utilities
Data Structures, Generics, and Popular Utilities
List, Set, and Map interfaces
Collections utilities
Arrays utilities
Object utilities
java.time package
Summary
Quiz
9
Java Standard and External Libraries
Java Standard and External Libraries
Java Class Library
External libraries
Summary
Quiz
10
Multithreading and Concurrent Processing
Multithreading and Concurrent Processing
Thread versus process
User thread versus daemon
Extending class thread
Implementing interface Runnable
Extending thread vs implementing Runnable
Using pool of threads
Getting results from thread
Parallel vs concurrent processing
Concurrent modification of the same resource
Summary
Quiz
11
JVM Structure and Garbage Collection
JVM Structure and Garbage Collection
Java application execution
Java processes
JVM structure
Garbage collection
Summary
Quiz
12
Managing Data in a Database
Managing Data in a Database
Creating a database
Creating a database structure
Connecting to a database
Releasing the connection
CRUD data
Summary
Quiz
13
Network Programming
Network Programming
Network protocols
UDP-based communication
TCP-based communication
UDP versus TCP protocols
URL-based communication
Using the HTTP 2 Client API
Summary
Quiz
14
Java GUI Programming
Java GUI Programming
Java GUI technologies
JavaFX fundamentals
Hello with JavaFX
Control elements
Charts
Applying CSS
Using FXML
Embedding HTML
Playing media
Adding effects
Summary
Quiz
15
Section 3: Advanced Java
Section 3: Advanced Java
16
Functional Programming
Functional Programming
What is functional programming?
Standard functional interfaces
Lambda expression limitations
Method references
Summary
Quiz
17
Java Standard Streams
Java Standard Streams
Streams as a source of data and operations
Stream initialization
Operations (methods)
Numeric stream interfaces
Parallel streams
Summary
Quiz
18
Reactive Programming
Reactive Programming
Asynchronous processing
Non-blocking API
Reactive
Reactive streams
RxJava
Summary
Quiz
19
Microservices
Microservices
What is a microservice?
The size of a microservice
How microservices talk to each other
The reactive system of microservices
Summary
Quiz
20
Java Microbenchmark Harness
Java Microbenchmark Harness
What is JMH?
Creating a JMH benchmark
Running the benchmark
JMH benchmark parameters
JMH usage examples
A word of caution
Summary
Quiz
21
Best Practices for Writing High-Quality Code
Best Practices for Writing High-Quality Code
Java idioms, their implementation, and their usage
Best design practices
Code is written for people
Testing is the shortest path to quality code
Summary
Quiz
22
Java - Getting New Features
Java - Getting New Features
Java continues to evolve
Panama project
Valhalla project
Amber project
Loom project
Skara project
Summary
23
Assessments
Assessments
Chapter 1 – Getting Started with Java 12
Chapter 2 – Java Object-Oriented Programming (OOP)
Chapter 3 – Java Fundamentals
Chapter 4 – Exception Handling
Chapter 5 – Strings, Input/Output, and Files
Chapter 6 – Data Structures, Generics, and Popular Utilities
Chapter 7 – Java Standard and External Libraries
Chapter 8 – Multithreading and Concurrent Processing
Chapter 9 – JVM Structure and Garbage Collection
Chapter 10 – Managing Data in a Database
Chapter 11 – Network Programming
Chapter 12 – Java GUI Programming
Chapter 13 – Functional Programming
Chapter 14 – Java Standard Streams
Chapter 15 – Reactive Programming
Chapter 16 – Microservices
Chapter 17 – Java Microbenchmark Harness
Chapter 18 – Best Practices for Writing High-Quality Code
24
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Amber project

The Amber project (https://openjdk.java.net/projects/amber) is focused on small Java syntax enhancements that would make it more expressive, concise, and simpler. These improvements are going to increase the Java programmers' productivity and make their code-writing more enjoyable.

Two Java features created by the Amber project have been delivered already and we talked about them:

  • The type holder var (see Chapter 1, Getting Started with Java 12) has been available to use since Java 10.
  • The local-variable syntax for lambda parameters (see Chapter 13, Functional Programming) was added to Java 11.
  • The less-verbose switch statement (see Chapter 1, Getting Started with Java 12) was introduced as a preview feature with Java 12.

Other new features are going to be released with the future Java version. We will look closer only at five of them in the following subsections...

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