Selenium Webdriver Day 3 : Abstraction and Encapsulation

By
Abstraction: In OOPS abstraction means hiding the implementation details from the end user or third party application like Paytm. In java, abstraction can be performed using Access Specifier(public, private, protected, default). We have already learned about access specifier in the previous article.
The example in real life: Take a scenario where user visiting e-commerce site like Paytm, netbankingMyntra etc, and after selecting an item he goes for the payment process into his bank net banking. Now in the case of an online transaction, there must be some method defined as public inside bank system so e-commerce website can complete their transaction. Also, all the other methods must be declared as private or protected so that outside user can not access their code just by using inheritance property.
By using abstraction property bank system secure their code.
Have a look into below code:
public class Account {
private float amount=10000.f;
private String name="Sachin";
//method for third party use
public void deduct_amount(float amt){
payment(amt);
}
//method for deduct amount calculation
private void payment(float amt){
amount=amount-amt;
}
}
In above example as you can see all the only one method is defined as public(deduct_amount) and as we have discussed we allowed accessibility of this method to every user so they can use this. All the other methods and variables are defined as private so no one can access that,
Encapsulation : Encapsulation means wrapping up data and methods together into a single unit.
Example :Look a the code below :
public class Account {
private float amount=10000.f;
private String name="Sachin";
//method for third party use
public void deduct_amount(float amt){
payment(amt);
}
//method for deduct amount calculation
private void payment(float amt){
amount=amount-amt;
some other class to save user data into database
SaveData d=new SaveData();
d.saveamount(user,amount);
}
}
In the payment() method we have defined a variable (amount), also we are creating an object and accessing method saveamount() using this method. Now if you look closely we are using this inside the single methods and this thing is known as encapsulation.
Python, Selenium, Java

Popular posts from this blog

Selenium Webdriver Day 4 : Inheritance

By
Inheritance : This is another major properties of OOPS(Object Oriented Programming). In this one class inherit the property of other class.Basically it means derivation of one class from another class, so that the attributes and methods of one class are part of the definition of another class. In this the first class is referred as base class or parent class . The second class is referred as child class or sub-class . To inherit a class we need use a keyword " extends " in sub-class. Why we use inheritance in java : > For method overriding. > For using methods and variables of one class to another class. > For code re-usability Look at the java code below : public class Parent { public void parent_method1() { System.out.println("This is parent method1 "); } public void parent_method2() { System.out.println("This is parent method2 "); } public void parent_method3() { System.out.println("This is parent method3 ...
Read more

Selenium Webdriver Day 1 : Class and object

By
To understand both topics first we have to learn about  OOPS(Object Oriented Programming)  Technique. In Object oriented programming we have to design a program using Objects and Classes. OOPS provide you the freedom from writing down the complete code within same class , it allow you to write down the code anywhere and access that code using objects. OOPS have some basic feature like (Abstraction, Encapsulation, Polymorphism and Inheritance ), we will discuss about this on later chapter. Class :  In java class is like a paperwork in which we define details of an object. Also we can say that this is a logical entity. Example : Human is a Class. Object :  An Object is a real time entity . We can also say that an object is a logical as well as physical entity. In java objects are created to use methods and variables defined inside the class.In java JVM(java virtual machine)  is responsible to create an object. Example : An individual human in this ea...
Read more

Python Programming - Log file is not capturing the data?

By
Image
If any one of you faced a problem during the selenium automation using python. Where you have coded a logger file utility with the below sample code logging.basicConfig(filename="./Logs/automation.log", format='%(asctime)s: %(levelname)s: %(message)s', datefmt='%m/%d/%Y %I:%M:%S %p') and automation.log fine is not getting created for you in Log folder. Solution is, use force=True complete code is import logging class LogGen: @staticmethod def logGen(): logging.basicConfig(filename="./Logs/automation.log", format='%(asctime)s: %(levelname)s: %(message)s', datefmt='%m/%d/%Y %I:%M:%S %p', force=True) logger = logging.getLogger() logger.setLevel(logging.INFO) return logger logfile will be created like this
Read more