Let’s see one moreexample of abstraction in Java using interfaces. In this example, I am creating various reports which can be run on demand at any time during the application’s lifetime. As a consumer of the
The best explanation of Abstraction is using the common example of sending SMS. When a user send SMS, he simply enter the address, type message in the text box and send it. He doesn’t know what is happening behind the scene when this message is getting send to the other user. So her...
Example of Encapsulation in Javaclass Person { private String name; private int age; // Getter method for name public String getName() { return name; } // Setter method for name public void setName(String name) { this.name = name; } // Getter method for age public int getAge() {...
From the example above, it is not possible to create an object of the Animal class:Animal myObj = new Animal(); // will generate an error To access the abstract class, it must be inherited from another class. Let's convert the Animal class we used in the Polymorphism chapter to an ...
Example of encapsulation: A class in java is a simplest example of encapsulation. It keeps the data(variables) and behavior(methods) of an entity together. A class also restricts access to these data and behavior through the use of access specifiers. The concept of keeping instance variables ...
(p7-3): 7.3 Defining Hierarchies in Java\n154 (p7-4): 7.4 A Simple Example\n161 (p7-5): 7.5 Exception Types\n161 (p7-6): 7.6 Abstract Classes\n166 (p7-7): 7.7 Interfaces\n167 (p7-8): 7.8 Multiple Implementations\n168 (p7-8-1): 7.8.1 Lists\n171 (p7-8-2): 7.8.2 ...
As a running (toy) example in this chapter, we consider a data base which can be queried using an operation qry and updated using an operation upd. Both are atomic, i.e., once invoked their effect is as if they finish immediately, and no concurrently invoked action can interfere with th...
} Example: //Abstract classabstractclassAnimal {//Abstract method (does not have a body)publicabstractvoidanimalSound();//Regular methodpublicvoidsleep() {System.out.println("Zzz");} }//Subclass (inherit from Animal)classPigextendsAnimal{publicvoidanimalSound() {//The body of animalSound() ...
In this example,Animalis an abstract class with an abstract methodmakeSound(). TheDogclass extendsAnimaland provides an implementation formakeSound(). Thesleep()method is a concrete method in the abstract class that can be used by subclasses. ...
Abstraction is present in almost all the real life machines. Your car is a great example of abstraction. You can start a car by turning the key or pressing the start button. You don’t need to know how the engine is getting started, what all components your car has. The car internal ...