In programming languages, an abstract class isa generic class (or type of object) used as a basis for creating specific objects that conform to its protocol, or the set of operations it supports. Abstract classes are not instantiated directly. What is an abstract class explain with an example?
importjava.util.*;abstractclassVehical{abstractvoidget();abstractvoidshow();}classCar extends Vehical{Scanner sc=newScanner(System.in);privatelongcost;privateStringname;voidget(){System.out.print("Enter the name of car :");name=sc.nextLine();System.out.print("Enter the cost of car :");cos...
Note 1:As we seen in the above example, there are cases when it is difficult or often unnecessary to implement all the methods in parent class. In these cases, we can declare the parent class as abstract, which makes it a special class which is not complete on its own. A class derive...
out.println("Bark"); } } public class AbstractExample { public static void main(String[] args) { Dog dog = new Dog(); dog.makeSound(); // Outputs: Bark dog.sleep(); // Outputs: Sleeping... } } In this example, Animal is an abstract class with an abstract method makeSound() ...
Here is a simple example of an Abstract Class in Java. package com.journaldev.design; //abstract class public abstract class Person { private String name; private String gender; public Person(String nm, String gen){ this.name=nm; this.gender=gen; ...
It means that one cannot create an object of an abstract class. 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...
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 ...
Let's take an example that helps us to better understand Java abstraction. Example 3: Java Abstraction abstract class MotorBike { abstract void brake(); } class SportsBike extends MotorBike { // implementation of abstract method public void brake() { System.out.println("SportsBike Brake"); }...
Example 1: abstract method in an abstract class //abstract classabstractclassSum{/* These two are abstract methods, the child class * must implement these methods */publicabstractintsumOfTwo(intn1,intn2);publicabstractintsumOfThree(intn1,intn2,intn3);//Regular methodpublicvoiddisp(){System.ou...
14 set(int index, E element) It is used to replace an element from the specified element. 15 subList(intfromIndex, inttoIndex) It is used to get elements from the specified range.Example:import java.util.*; public class AbstractListDemo1 { public static void main(String args[]) { Abstr...