You may also note that Java is case-sensitive. We are going to discuss, step by step, each line of code just below.įor now, I want you to start by noting that every line of code that runs in Java must be in a class. My name is Patrick Cyubahiro.") ĭon't worry if you don't understand the above code at the moment. After creating and saving the file, we are going to use the below lines of code to get the expected output. We are going to start by creating our first Java file called Main.java, which can be done in any text editor. Let's write a Java program that prints the message “Hello freeCodeCamp community. When saving a file, save it using the class name and add “.java ” to the end of the file name. In Java, every application starts with a class name, and this class must match the file name. Mobile applications (especially Android apps).Java is a general-purpose, class-based, object-oriented programming language, which works on different operating systems such as Windows, Mac, and Linux. ![]() In this article, we will be looking at the following OOP concepts: The core concept of the object-oriented approach is to break complex problems into smaller objects. These objects can contain data in the form of fields (often known as attributes or properties) and code in the form of procedures (often known as methods). Object-oriented programming (OOP) is a fundamental programming paradigm based on the concept of “objects ”. ![]() Once you understand these concepts, you should have the confidence and ability to develop basic problem-solving applications using object-oriented programming principles in Java. This article will help give you a thorough understanding of the underlying principles of object-oriented programming and its concepts. Whenever we use a method that was already implemented/written in another class by changing its parameters this is the example of method overriding.Hi, folks! Today we are going to talk about object-oriented programming in Java. If the subclass or child class has the same method as declared in the parent class, it is known as method overriding in Java. In Implicit wait when we use different time stamps such as SECONDS, MINUTES, HOURS, etc is one of the possible examples of method overloading. If a class has multiple methods having the same name but different in parameters, it is known as Method Overloading. In Java polymorphism can be achieved in two ways: METHOD OVERLOADING Polymorphism allows us to perform a single action in different ways. ![]() All the classes which we write in our automation framework are an example of Encapsulation.įor e.g In Page object model classes, in which we declare the WebElement locator using and initialization of this data members will be done using Constructor to utilize those in test methods. In this case, extending one class into another class is an example of implementing Inheritance.Įncapsulation is a mechanism of wrapping data (variables) and code together as a single unit. When We create a Base Class in our automation Framework to initialize WebDriver interface, waits, loggers, reports, etc., and when we extend this Base Class in other classes such as Tests and Utility Class. The process by which one class acquires the properties (instance variables) and functionalities of another class are called inheritance. In our Automation Framework whenever we Use the Page object Model, we write all the locators in the page class and use this locator in our test it means we are hiding our implementation from the user this is a simple example of using abstraction in the framework. It also helps to reduce programming complexity and effort. ABSTRACTIONĪs we are aware, Abstraction is a process of hiding the implementation details from the user and showing only relevant details to them. Here WebDriver is an Interface as mentioned earlier and Chromedriver is a class. It means we are creating a reference variable (driver) of the interface (WebDriver) and creating an Object. So based on this statement, WebDriver driver = new Chromedriver() we are initializing chrome browser using Selenium WebDriver. In this case, WebDriver itself is an Interface. ![]() To understand this the very basic statement we write in Selenium WebDriver driver = new Chromedriver() An interface also contains methods and variables just like the class but the methods declared in the interface are by default abstract. Java Object-Oriented Concepts in Selenium Automation Framework INTERFACEĪn interface in the Java programming language is an abstract type that is used to specify a behavior that classes must implement.
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