Automation Testing - Part 2 (Things to know in JAVA) - SLT
- 1. Presenter & Creator :- Ankit D. Prajapati Skype: SoftwareLearningTutorials Email: [email protected] WhatsApp: +91-7383908668 Software Learning Tutorials !!! 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 Software Learning Tutorials !!!
- 3. What is JAVA ? Software Learning Tutorials !!! 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 ? Software Learning Tutorials !!! JAVA OOPS High Performance Secure Robust Platform Independent Multi Threaded
- 5. Class – Object – Method Software Learning Tutorials !!! 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 Software Learning Tutorials !!!
- 7. Interface & Packages Software Learning Tutorials !!! 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 Software Learning Tutorials !!! 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 Software Learning Tutorials !!! To be continued…!!!
- 10. Package Software Learning Tutorials !!! 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…!!!
- 12. Modifier Software Learning Tutorials !!! 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 Software Learning Tutorials !!! Inheritance Encapsulation Abstraction Polymorphism OOPS To be continued…!!!
- 14. OOPS - Inheritance Software Learning Tutorials !!! 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 Software Learning Tutorials !!! 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 Software Learning Tutorials !!! Abstraction is the process in Java used to hide certain details and only show the essentials features of the objects. Abstract Class Interface
- 17. Software Learning Tutorials !!! OOPS - Polymorphism Polymorphism means taking many forms, where ‘poly’ means many and ‘morph’ means forms.
- 19. Software Learning Tutorials !!! YouTube Channel: Software Learning Tutorials - SLT!!! https://www.youtube.com/channel/UC_FRkF_0i_YgbFNqzRZ-Nmg