Latest Tutorials| Questions and Answers|Ask Questions?|Site Map



Home Answers Viewqa Java-Beginners Java-Abstract Class
Login         

View Questions and Answers by Category

Advertisements


 
Have Programming Question? Ask it here!
 
 
 


venkatesh
Java-Abstract Class
1 Answer(s)      4 years and a month ago
Posted in : Java Beginners


Can a abstract class have a constructor ?When would the constructor in the abstract class be called ?
Please give me with good example code..Please implement the example with code. THanks in advance.

Advertisement
View Answers

August 20, 2010 at 1:12 PM


Hi Friend,

Yes. But Abstract class constructors will be called when its concrete subclass will be instantiated.

For ex:

abstract class MyAbstractClass {

MyAbstractClass(){

System.out.println("I am abstract class constructor");
}

public abstract void show();
public void display(){
System.out.println("display() method in Abstract Class");
}
}

public class Value extends MyAbstractClass{
public void show() {
System.out.println("I am show method");

}
public static void main(String[] args) {

MyAbstractClass cl = new Value();
cl.display();
cl.show();
}
}

Thanks


Related Tutorials/Questions & Answers:
Java abstract class
Java abstract class  Can an abstract class be final
java abstract class - Development process
java abstract class  how to save and run abstract class program in java?please immediately reply sir.  Hi Friend, Consider the following example, abstract class A { abstract void hi(); void hello
Advertisements
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
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 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
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...://www.roseindia.net/help/java/a/java-abstract-class.shtml http://www.roseindia.net/java/master-java/abstract-class.shtml
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... the following links: http://www.roseindia.net/help/java/a/java-abstract-class.shtml
class
class  Is a class a subclass of itself
class
is a class to represent a country in medal tally. It has an attribute of country... medals. In this class, you should also define constructors, and assessor, mutator methods. Task 2 MedalTally.java is a class to model a medal tally, containing
Class
Class, Object and Methods       Class : Whatever we can see in this world all the things... is termed as a class. All the objects are direct interacted with its class
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 and Abstract class
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...)Members of a Java interface are public by default. A Java abstract class can have
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
Super class of an Exception class
Super class of an Exception class  hello,,, What is super class of an Exception class?   hii,, the super class of an exception is throwable class. and the super class of an throwable class is the object class
Class
C:\roseindia>java Classtest It's a example of class... Class       This section explores the concept of a class in reference to object oriented programming
class file
class file  How to create class file in jsf easily
class loaders
class loaders   Explain static and dynamic class loaders
.class and .tld
.class and .tld  how to create .class and .tld file
inner class
inner class  what is mean by inner class   Inner class is a non-static class which is defined inside another class
Node class
Node class   hii, What is a node class?   hello, A node class is a class that has added new services or functionality beyond the services inherited from its base class
Uses of abstract class & interface - Java Beginners
Uses of abstract class & interface  Dear sir, I'm new to java. I knew the basic concepts of interface and the abstract class. But i dont... classes from different types of hierarchy. Abstract Class: Any class
Matrix Class
Matrix Class   A class to manage matrices and add them. Create in the driver class two objects of it and use the add method
Matrix Class
Matrix Class   A class to manage matrices and add them. Create in the driver class two objects of it and use the add method
wrapper class
wrapper class  list wrapper class methods
wrapper class
wrapper class  wrapper class methods
printstrim class
printstrim class  discribe PrintStream class
printstrim class
printstrim class  discribe PrintStream class
Abstract class
Abstract class  what is an Abstract class
singleton class
singleton class  What is singleton class
Abstract class
Abstract class  Can an abstract class be final
 

 

 

DMCA.com