Abstract class

Home Answers Viewqa Java-Beginners Abstract class

Abstract class
1 Answer(s) 4 months and 8 days ago
Posted in : Java Beginners

Calendar cal=Calendar.getInstance() We know that Calendar is an abstract class so it can't be instantiated. So how we can say that cal is an instance of Calendar???

Beginner Question I suppose. Thanks in advace.

View Answers

January 16, 2013 at 3:57 PM

Hi , yes Calendar is an abstract class and it is not possible to create object directly by invoking the constructors in Calendar class.

Calendar cal=Calendar.getInstance()

In this cal is not a object to Calendar class directly , it is a object to java.util.GregorianCalendar class. Hear GregorianCalendar is sub class to Calendar and it is not a abstract. In this above code we are handling the GregorianCalendar class object by using it's super class Calendar class reference variable.

Abstract class
Abstract class Can an abstract class be final

Abstract class
Abstract class what is an Abstract class

abstract class
abstract class Can there be an abstract class with no abstract methods

abstract class
abstract class Explain the concept of abstract class and it?s use with a sample program. Java Abstract Class An abstract class is a class that is declared by using the abstract keyword. It may or may not have

Abstract class
Abstract class j An Abstract class is a base class which... with an abstract keyword. For more information, visit the following links: http://www.roseindia.net/help/java/a/java-abstract-class.shtml http://www.roseindia.net/java

abstract class
abstract class abstract class AbstractClass{ } is possible and compile the class or any compile time error occur tell me the answer Blockquote

abstract class
abstract class what is abstract class .why we use it or what is the need of this class? Abstract class is like base class which contains abstract method and cannot instantiated. Please go through

Abstract class
Abstract class Calendar cal=Calendar.getInstance() We know that Calendar is an abstract class so it can't be instantiated. So how we can say that cal is an instance of Calendar??? Beginner Question I suppose. Thanks in advace

code for abstract class
code for abstract class code for abstract class

Abstract class and abstract method
be private because it defined in the other class. An abstract methods cannot... points about abstract methods are as following An abstract class may or may... also. An abstract class cannot be instantiated so it need to be a sub class

What is an abstract class?
What is an abstract class? What is an abstract class

Java Abstract Class
Java Abstract Class An abstract class is a class that is declared by using the abstract keyword...; --or-- Java provides a special type of class called an abstract class

Java abstract class
Java abstract class Can an abstract class be final

Why Abstract Class?
Why Abstract Class? What is the use of Abstract Class if it has Zero Abstract methods

variables and methods declared in abstract class is abstract or not
variables and methods declared in abstract class is abstract or not variables and methods declared in abstract class is abstract

Abstract class,Abstract methods and classes
(); Abstract Class In java programming language, abstract classes... to implement the methods inherited from the abstract class (base class). Abstract classes are not instantiated directly. First extend the base class

abstract class - Java Beginners
abstract class what exactly is abstract class and in which cases its... inherited from the abstract class (base class). Abstract classes... . e.g. abstract class A{ public abstract abs_value(); void show

Abstract class and interface in Java
Abstract class and interface in Java What is the difference between abstract class and interfaces in Java? Differences between an interface and an abstract class: At the same time multiple interfaces can

Interface vs abstract class
Interface vs abstract class Hai, Is there any possible to defining abstract methods in Interface

Abstract class - Java Beginners
Abstract class Why can use abstract class in java.?when abstract class use in java.plz Explain with program. abstract class abs{ public void display(){ } public abstract void display1(); } public class win

Interface and Abstract class
and Abstract class? Give some example Difference Between Interface and Abstract Class 1)Main difference is methods of a Java interface are implicitly abstract and cannot have implementations. A Java abstract class can have instance

Interface and Abstract class
is the difference between an Interface and an Abstract class? hi, Very Good Question Abstract class is a class which contain one or more abstract methods and these method implemented by sub classes. Abstract class definition

abstract method
abstract method is final method is in abstract class

abstract method
abstract method Can we have abstract class with no abstract methods

Java Abstract Class Example
Java Abstract Class Example In this section we will read about the Abstract class. Abstract class in Java is a class which is created for abstracting the behaviour of classes from the outside environment. Abstract class can be created

Write Full concept of abstract class
Write Full concept of abstract class Abstract class

Abstract Class in Java
Abstract class in Java is a class that is declared using abstract keyword. It cannot be instantiated but can be extended into subclass. Abstract class cannot be instantiated means that new instances of an abstract class cannot

Explain final class, abstract class and super class.
Explain final class, abstract class and super class. Explain final class, abstract class and super class. Explain final class, abstract.... An abstract class is a class that is declared by using the abstract keyword. It may

abstract method
abstract method Can a concrete class have an abstract method

what's the purpose of constructor in abstract class?
what's the purpose of constructor in abstract class? what's the purpose of constructor in abstract class

What is an Abstract Class and what is it's purpose?
What is an Abstract Class and what is it's purpose? Hi, What is an Abstract Class and what is it's purpose? Thanks

Can a abstract class be declared final?
Can a abstract class be declared final? Hi, Can a abstract class be declared final? Thanks

abstract class - Java Interview Questions
abstract class Explain the abstract class and abstract method...://www.roseindia.net/java/master-java/abstract-class.shtml http://www.roseindia.net/help/java/a/java-abstract-class.shtml Hope that it will be helpful for you. Thanks

Interface Vs Abstract Class
Interface Vs Abstract Class ... extend one class an abstract class may have some method implementation (non..., an interface is equivalent to a fully abstract class (a class with only public abstract

abstract class and interface - Java Beginners
abstract class and interface what is the need for an abstract class? when should we use an abstract class? when should we use interface instead of abstract class? Hi friend, Abstract classes In java

Java-Abstract Class - Java Beginners
Java-Abstract Class Can a abstract class have a constructor ?When would the constructor in the abstract class be called ? Please give me with good...; Hi Friend, Yes. But Abstract class constructors will be called when its

abstract class and overriding - Java Beginners
abstract class and overriding what is the difference between abstract class and overriding? Interface? Give some example program? Hi friend, Abstract class : In java programming language, abstract classes

Abstract class or methods example-1
;Animal class"); // this // ...;form Animal class"); } } class ...;called form BuzzwordAnimal class"); }

Can a abstract class be defined without any abstract methods?
Can a abstract class be defined without any abstract methods? hi, Can a abstract class be defined without any abstract methods? thanks

java abstract class - Development process
java abstract class how to save and run abstract class program... example, abstract class A { abstract void hi(); void hello() { System.out.println("This is a hello() method."); } } class B extends A { void hi

How to Declare Abstract Class in PHP ?
How to Declare Abstract Class in PHP ? hi, I am a PHP Beginners. As i am trying to make an application where i trying to declare the abstract class of PHP. Please any one explain me how to declare abstract class in PHP program

Using Abstract Class
Using Abstract Class ... class. This class must be inherited. Unlike interface the abstract class may... method should be abstract. We can't instantiate the object of the abstract class

An Abstract class may or may not have abstract method.
Description: An Abstract is also known as Abstract Base Class. Abstract Class... declaration is done in its derived class not in the abstract class. Abstract itself... Description: In this example you are going to see that there is abstract class

Abstract class and Interface - Java Magazine
Abstract class and Interface Dear Sir, Please anyone help me........I wane exact difference between Abstract class and Interface.what... abstract class AbstractExample { public AbstractExample(){ System.out.println

Abstract and Interface
Interface and Abstract Class 1)Main difference is methods of a Java interface are implicitly abstract and cannot have implementations. A Java abstract class... declared in a Java interface is by default final. An abstract class may contain non

Abstract class or methods example-2
;defined in the non abstract class } abstract class ...;runLion1(); // defined in the non abstract class

overriding in derived class from abstract class
overriding in derived class from abstract class why should override base class method in derived class? Instead of override abstract class method, we can make method implementation in derived class itself know

PHP Abstract Class
PHP Abstract Class: Abstract classes and methods are introduced in PHP 5. The concept behind the abstract class is that we need to extend this class by its descendant class(es). If a class contains abstract method then the class must

why we use abstract class in java?
why we use abstract class in java? what is the the purpose of abstract class.Give example when to use abstract and when use interface

Ask Questions?

If you are facing any programming issue, such as compilation errors or not able to find the code you are looking for.

Ask your questions, our development team will try to give answers to your questions.

Tutorial Topics