1. Selenium WebDriver Web Test Tool Training
Portnov Computer School
Selenium WebDriver Web Test Tool Training
Test Automation For Web-Based Applications
Presenter: Ellie Skobel

2. Day 1
Java Concepts

3. What Is an Object?
Software objects are used to model real-world objects that you find in everyday life
Objects have state and behavior
Object stores its state in fields (a.k.a variables)
Object exposes its behavior through methods
Methods operate on an object's internal state
Methods serve as the primary mechanism for object-to- object communication.
Hiding internal state and requiring all interaction to be performed through an object's methods is known as data encapsulation

4. Object Behaviors = Methods State= Variable Bark 50 lb Chase_Cat Hungry
Wag_Tail
Fluffy

5. What Is a Class?
A class is a blueprint or prototype from which objects are created

6. What Is Inheritance?
Objects often have a certain amount in common with each other
Object-oriented programming allows classes to inherit commonly used state and behavior from other classes.
The class from which common state and behavior are inherited becomes the superclass
Each class is allowed to have one direct superclass, and each superclass has the potential for an unlimited number of subclasses:

7. Inheritance
4 Paws
Bark
Tail

8. What Is Interface?
An interface is a contract between a class and the outside world.
When a class implements an interface, it promises to provide the behavior published by that interface.
An interface is a group of related methods with empty bodies
Implementing an interface allows a class to become more formal about the behavior it promises to provide
If a class implements an interface, all methods defined by that interface must appear in its source code before the class will successfully compile.

9. Interface
Chase
Bark
Roll-over
Tail
Wet Nose

10. What Is a Package?
A package is a namespace for organizing classes and interfaces in a logical manner
Conceptually packages are similar to different folders on a computer
Java platform provides an enormous class library (a set of packages) suitable for use in your own applications known as the Java Application Programming Interface (API)
The Java Platform API Specification contains the complete listing for all packages, interfaces, classes, fields, and methods supplied by the Java Platform