Java 9 with JShell - Introducing the full range of Java 9's new features via JShell (true pdf).

Cover
Copyright
Credits
About the Author
Acknowledgement
About the Reviewer
www.PacktPub.com
Customer Feedback
Table of Contents
Preface
Chapter 1: JShell–A Read-Evaluate-Print-Loop for Java 9
	Getting ready for our journey toward OOP with Java 9
	Installing the required software on Windows, macOS, or Linux
		Understanding the benefits of working with a REPL
		Checking default imports and using auto-complete features
	Running Java 9 code in JShell
		Evaluating expressions
	Working with variables, methods, and sources
	Editing the source code in our favorite external code editor
	Loading source code
	Test your knowledge
	Summary
Chapter 2: Real-World Objects to UML Diagrams and Java 9 via JShell
	Identifying objects from applications requirements
	Capturing real-world objects
	Generating classes to create objects
	Recognizing variables and constants
	Identifying actions to create methods
	Organizing classes with UML diagrams
	Using feedback from domain experts
	Test your knowledge
	Summary
Chapter 3: Classes and Instances
	Understanding classes and instances in Java 9
	Working with object initialization and its customization
	Introducing garbage collection
	Declaring classes
	Customizing constructors and initialization
	Understanding how garbage collection works
	Creating instances of classes and understanding their scope
	Exercises
		Exercise 1
		Exercise 2
	Test your knowledge
	Summary
Chapter 4: Encapsulation of Data
	Understanding members composing a class
	Declaring immutable fields
	Working with setters and getters
		Exploring access modifiers in Java 9
	Combining setters, getters, and fields
	Transforming values with setters and getters
	Using static fields to provide class-level values
	Using static methods to provide overridable class-level values
	Test your knowledge
	Summary
Chapter 5: Mutable and Immutable Classes
	Creating mutable classes in Java 9
	Working with mutable objects in JShell
	Building immutable classes in Java 9
	Working with immutable objects in JShell
	Understanding the differences between mutating and non-mutating objects
	Learning the advantages of non-mutating objects when writing concurrent code
	Working with instances of the immutable String class
	Creating the immutable version of an existing mutable class
	Test your knowledge
	Summary
Chapter 6: Inheritance, Abstraction, Extension, and Specialization
	Creating class hierarchies to abstract and specialize behavior
	Understanding inheritance
	Creating an abstract base class
	Declaring classes that inherit from another class
	Overriding and overloading methods
	Test your knowledge
	Summary
Chapter 7: Members Inheritance and Polymorphism
	Creating concrete classes that inherit from abstract superclasses
	Understanding polymorphism
	Controlling overridability of members in subclasses
	Controlling subclassing of classes
	Creating methods that work with instances of different subclasses
	Test your knowledge
	Summary
Chapter 8: Contract Programming  with Interfaces
	Understanding how interfaces work in combination with classes
	Declaring interfaces
	Declaring classes that implement interfaces
	Taking advantage of the multiple inheritance of interfaces
	Combining class inheritance and interfaces
	Test your knowledge
	Summary
Chapter 9: Advanced Contract Programming with Interfaces
	Working with methods receiving interfaces as arguments
	Downcasting with interfaces and classes
	Treating instances of an interface type as a different subclass
	Taking advantage of default methods in interfaces in Java 9
	Test your knowledge
	Summary
Chapter 10: Maximization of Code Reuse with Generics
	Understanding parametric polymorphism, Java 9 generics, and generic code
	Declaring an interface to be used as a type constraint
	Declaring a class that conforms to multiple interfaces
	Declaring subclasses that inherit the implementation of interfaces
	Creating exception classes
	Declaring a class that works with a constrained generic type
	Using a generic class for multiple compatible types
	Test your knowledge
	Summary
Chapter 11: Advanced Generics
	Creating a new interface to be used as a constraint for a second type parameter
	Declaring two classes that implement an interface to work with two type parameters
	Declaring a class that works with two constrained generic types
	Creating instances of a generic class with two generic type parameters
	Test your knowledge
	Summary
Chapter 12: Object-Oriented, Functional Programming, and Lambda Expressions
	Understanding functions and methods as first-class citizens
	Working with functional interfaces and lambda expressions
	Creating a functional version of array filtering
	Creating a data repository with generics and interfaces
	Filtering collections with complex conditions
	Using a map operation to transform values
	Combining a map operation with reduce
	Chaining many operations with map and reduce
	Working with different collectors
	Test your knowledge
	Summary
Chapter 13: Modularity in Java 9
	Refactoring existing code to take advantage of object-oriented programming
	Organizing object-oriented code with the new modularity in Java 9
	Creating modular source code
	Compiling multiple modules with the Java 9 compiler
	Run modularized code with Java 9
	Test your knowledge
	Summary
Appendix: Exercise Answers
	Chapter 1, JShell – A Read-Evaluate-Print-Loop for Java 9
	Chapter 2, Real-World Objects to UML Diagrams and Java 9 via JShell
	Chapter 3, Classes and Instances
	Chapter 4, Encapsulation of Data
	Chapter 5, Mutable and Immutable Classes
	Chapter 6, Inheritance, Abstraction, Extension, and Specialization
	Chapter 7, Members Inheritance and Polymorphism
	Chapter 8, Contract Programming with Interfaces
	Chapter 9, Advanced Contract Programming with Interfaces
	Chapter 10, Maximization of Code Reuse with Generics
	Chapter 11, Advanced Generics
	Chapter 12, Object-Oriented, Functional Programming, and Lambda Expressions
	Chapter 13, Modularity in Java 9
Index