Automation Testing - Part 2 (Things to know in JAVA) Author: Mr. Ankit Prajapati Below Topics are Covered:  What is Java?  What make Java so popular?  Class, Objects & Method  Interface & Package  Modifiers  OOPS Concept Software Learning Tutorials - SLT ...!!!

1. Presenter & Creator :- Ankit D. Prajapati
Skype: SoftwareLearningTutorials
Email: SoftwareLearningTutorials@gmail.com
WhatsApp: +91-7383908668
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YouTube Channel: Software Learning Tutorials – SLT !!!
https://www.youtube.com/channel/UC_FRkF_0i_YgbFNqzRZ-Nmg

2. Agenda
 What is JAVA?
 What make JAVA Popular?
 Class, Object & Method
 Interface & Package
 Modifiers
 OOPS Concepts
 References
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3. What is JAVA ?
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Java is a programming language that produces software for
multiple platforms.
Java derives much of
its syntax from the C
and C++
programming
languages.
It was first released by
Sun Microsystem in
1995 and later acquired
by Oracle Corporation
Java platform includes an
execution engine, a
compiler, and a set of
libraries.

4. What make JAVA Popular ?
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JAVA
OOPS
High
Performance
Secure
Robust
Platform
Independent
Multi
Threaded

5. Class – Object – Method
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Class is a user defined
blueprint or prototype from
which objects are created.
Object is an instance of Class.
States & Behaviours
Method is a collection of
statements that are grouped
together to perform an operation
To be continued…!!!

6. Class – Object – Method
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7. Interface & Packages
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To be continued…!!!
Interface: An interface is just like Java Class, but it only
has static constants and abstract method.
A class implements an interface, thereby inheriting the
abstract methods of the interface.
Package as the name suggests is a pack (group) of
classes, interfaces and other packages.
In java we use packages to organize our classes and
interfaces

8. Interface & Abstract Class
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To be continued…!!!
 Java uses Interface to implement multiple
inheritance.
 A Java class can implement multiple Java
Interfaces.
 Class contains ‘Abstract’ keyword.
 If a class is declared abstract, it cannot be
instantiated, which means you cannot
create an object of an abstract class.
Abstract Class Interface
 An abstract class can extend only one
class or one abstract class at a time.
 An interface can extend any number of
interfaces at a time.
 An abstract class can extend another
concrete (regular) class or abstract class.
 An interface can only extend another
interface.
 An abstract class can have both abstract
and concrete methods.
 An interface can have only abstract
methods.
 An abstract class can have protected and
public abstract methods
 An interface can have only have public
abstract methods

9. Interface
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To be continued…!!!

10. Package
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import java.util.Scanner
Here:
→ java is a top level package
→ util is a sub package
→ Scanner is a class which is present in the sub package util
Reusability: While developing a project in java, we often feel that there
are few things that we are writing repeatedly in our code.
Better Organization: In large java projects where we have several
hundreds of class.
Name Conflicts: We can define two classes with the same name in
different packages so to avoid name collision.
To be continued…!!!

11. Package
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12. Modifier
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Modifiers are keywords that you
add to those definitions to
change their meanings. Java
language has a wide variety of
modifiers.
Access Modifiers: Default, Private, Protected, Public
Non-Access Modifiers: Static, Final, Abstract
Access Layer Default Private Protected Public
Same Class Yes Yes Yes Yes
Same Package – Sub Class Yes No Yes Yes
Same Package – Non Sub Class Yes No Yes Yes
Different Package – Sub Class No No Yes Yes
Different Package – Non Sub Class No No No Yes

13. OOPS Concepts
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Inheritance Encapsulation
Abstraction Polymorphism
OOPS
To be continued…!!!

14. OOPS - Inheritance
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Inheritance means accessing one-class properties from another class.
Class C Class D
Class B
Class A
Class C
Class D
Class B
Class A
Single
Inheritance
Hierarchical
Inheritance
Multiple
Inheritance
Valid by Both: Class & Interface Invalid by Class, Valid by Interface

15. OOPS - Encapsulation
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Encapsulation is a mechanism where you bind your data and code together as a single unit
VariablesMethodsClass
Encapsulation
 We can achieve encapsulation in Java by:
 Declaring the variables of a class as private.
 Providing public setter and getter methods to modify and view the variables values

16. OOPS - Abstraction
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Abstraction is the process in Java used to hide certain details and only show the essentials
features of the objects.
Abstract Class Interface

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OOPS - Polymorphism
Polymorphism means taking many forms, where ‘poly’ means many and ‘morph’ means forms.

18. References
https://www.tutorialspoint.com/
https://www.geeksforgeeks.org/
https://www.techopedia.com/
https://www.guru99.com/
https://beginnersbook.com/
https://www.edureka.co/
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19. Software
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YouTube Channel: Software Learning Tutorials - SLT!!!
https://www.youtube.com/channel/UC_FRkF_0i_YgbFNqzRZ-Nmg