Abstract class: is a restricted classthat cannot be used to create objects(to access it, it must be inherited from another class). Abstract method: can only be used in an abstract class, and it does not have a body. The body is provided by the subclass (inherited from). What is an ...
Abstract classes are useful when you want to create a generic type that is used as a superclass for two or more subclasses, but the superclass itself does not represent an actual object. For example: As in case of Shape class which we need for inheritance and polymorphism but want only ...
To explain with an abstract class example in Java: Imagine an abstract class named “Vehicle”. This class might have an abstract method called “move”. While the concept of moving is common to all vehicles, the way a car moves differs from how a boat or an airplane does. Thus, subclas...
Also, there is no way and it’s not possible to have an abstract method in a final class. Is it possible to inherit from multiple abstract classes in Java? Java does not support multiple inheritance. In java we can only Extend a single class. ...
Implementation is done similarly in Java. For example, using the keywordimplementswill make a Java interface, while the keywordextendsmakes an abstract class. Abstraction vs. encapsulation Encapsulationin object-oriented programming is the process of wrapping all the important information contained inside ...
}publicclassRectangleextendsFigure {privatefloatlength, width;publicfloatgetArea(Figure other) {returnlength *width; } } Why did we declare the getArea method to be abstract in the Figure class? Well, what does the getArea method do? It returns the area of a specific shape. But, because the...
(a) Explain the difference between a class and an object in Java. (b) What is the package in Java? What does an attribute do? What is FAT (file allocation table) What's a CSS profile? Define a C++ class named Money that stores a monetary amount. The class should have two private ...
However, the java.util.Random class does this for you with the following new methods: ints(), longs(), and doubles(). Each of those methods is overloaded with definitions similar to the following:ints(): An infinite Stream of random integers. ints(int n, int m): An infinite Stream ...
Maven Compiler Plugin: This plugin compiles the Java source code in your project, offering options to define Java and bytecode versions. It ensures proper configuration and provides compilation-related functionalities. Maven Surefire Plugin: With this plugin, unit tests can be executed effortlessly, ...
Can a Java class extend multiple classes? No, Java supports single inheritance, so a class can only extend one class. 15 How many interfaces can a Java class implement? A class can implement multiple interfaces. 15 What does extends do in Java? It allows a class to inherit properties and...