Which of the following lines declares an instance method that cannot be overridden in any subclass:
public void talk(): final {
public final void talk() {
public notOverrideable void talk() {
We have an abstract superclass named
Shape
. TheCircle
class is a subclass ofShape
and is a concrete class. If we create an instance ofCircle
namedcircle
, this instance will also be:An instance of
Shape
.A subclass of
Circle
.An abstract superclass of
Circle
.
In UML diagrams, class names that use italic text format indicate that they are:
Concrete classes.
Classes that override at least one member inherited from its superclass.
Abstract classes.
Which of the following lines declares a class that cannot be subclassed:
public final class Dog extends VirtualAnimal {
public final class Dog subclasses VirtualAnimal {
public final Dog subclasses VirtualAnimal {
Which of the following lines declares a concrete class named
Circle
that can be subclassed and whose superclass is theShape
abstract...
Java 9 with JShell
By :
Java 9 with JShell
By:
Overview of this book
The release of Java 9 has brought many subtle and not-so-subtle changes to the way in which Java programmers approach their code. The most important ones are definitely the availability of a REPL, known as JShell, which will make experiments and prototyping much more straightforward than the old IDE-based project-led approach. Another, more subtle change can be seen in the module system, which will lead to more modularized, maintainable code. The techniques to take full advantage of object-oriented code, functional programming and the new modularity features in Java 9 form the main subjects of this book.
Each chapter will add to the full picture of Java 9 programming starting out with classes and instances and ending with generics and modularity in Java.
Table of Contents (23 chapters)
Java 9 with JShell
Credits
About the Author
Acknowledgement
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
Free Chapter
JShell – A Read-Evaluate-Print-Loop for Java 9
Real-World Objects to UML Diagrams and Java 9 via JShell
Classes and Instances
Encapsulation of Data
Mutable and Immutable Classes
Inheritance, Abstraction, Extension, and Specialization
Members Inheritance and Polymorphism
Contract Programming with Interfaces
Advanced Contract Programming with Interfaces
Maximization of Code Reuse with Generics
Advanced Generics
Object-Oriented, Functional Programming, and Lambda Expressions
Modularity in Java 9
Exercise Answers
Index
Customer Reviews