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



Home Answers Viewqa Java-Interview-Questions Java run time polymorphism

Have Programming Question? Ask it here!
 
 
 


samar
Java run time polymorphism
5 Answer(s)      3 years and 10 months ago
Posted in : Java Interview Questions


What is run-time polymorphism or dynamic method dispatch ?

Advertisement
View Answers

October 29, 2010 at 12:56 PM


Hi Friend,

Dynamic dispatch is a mechanism by which a call to Overridden function is resolved at runtime rather than at Compile time , and this is how Java implements Run time Polymorphism. In dynamic method dispatch,super class refers to subclass object and implements method overriding.

Example:

class Flower {
void which() {
System.out.println("A Beautiful flower.");
}
}
class Rose extends Flower {
void which() {
System.out.println("Rose");
}
}
class Lotus extends Flower {
void which() {
System.out.println("Lotus.");
}
}
class Test {

public static void main(String[] args) {
Flower ref1 = new Flower();
Flower ref2 = new Rose();
Flower ref3 = new Lotus();
ref1.which();
ref2.which();
ref3.which();
}
}

Thanks



June 21, 2012 at 1:15 PM


A Beautiful flower.

Rose

Lotus.



June 21, 2012 at 1:15 PM


A Beautiful flower.

Rose

Lotus.



June 21, 2012 at 1:15 PM


A Beautiful flower.

Rose

Lotus.



October 5, 2012 at 12:31 PM


what is run time resolving



Related Tutorials/Questions & Answers:
Java run time polymorphism
Java run time polymorphism  What is run-time polymorphism or dynamic method dispatch
Run time polymorphism
Run time polymorphism  What is run time polymorphism or dynamic method dispatch
Advertisements
java run time error - JDBC
java run time error  when i m running for batch execution program in jdbc i m facing this kind of runtime error as Exception in thread "main" java.sql.SQLException: Io exception: The Network Adap ter could not establish
java run time error - Java Beginners
java run time error  when i compile my program it didnt show any error in my program.but i cant run my program, if i run my program means..." java.lang.ArrayIndexOutOfBoundsException: 0 at Armstrong.main(Armstrong.java:22) Java Result: 1
java run time error in loading the driver - JDBC
java run time error in loading the driver  when i mrunning the program in oracle using type 4 driver it is giving the error as Error:jdbc.driver.OracleDriver the code was as follows: please suggest me how it can
Polymorphism - Java Beginners
Q: Isn't it possible to detect the method's associatation, in case of method overriding, at compile time itself, why does it need to wait until the program is run (run-time polymorphism) ? Isn't java compiler having such an ability
java run time error - Java Beginners
java run time error  i am getting error "main" java.lang.NullPointerException" in my program, iam sending code actually motive of program... only, i have to display number of files and its last modified time ,i use
Polymorphism - Java Beginners
Polymorphism  what is dynamic polymorphism? with example  Hi friend, Dynamic polymorphism is run time polymorphism. Thanks  The term static polymorphism is associated with overloaded methods because
error in java progran at run time - Java Beginners
error in java progran at run time  Hello sir,,, i make a servlet program in java,,but i face some problem,,so please me.. Actually this type of error are come in my all servlet program My Servlet-- Error
error in java progran at run time - Java Beginners
error in java progran at run time  Hello sir,,, i make a servlet program in java,,but i face some problem,,so please me.. Actually this type of error are come in my all servlet program My Servlet-- Error
PHP Polymorphism Function
of OOP language. Generally we get polymorphism in two ways: Compile time Run time Compile time polymorphism PHP is like function overloading, operator... functions are the examples of PHP Run time polymorphism. PHP supports Inheritance
java applet run time error - Applet
java applet run time error  Hi, Im new to java applet.please help me. i have create a MPEG movie player in applet. when i run that program... { Player player = null; /*String location="file:///E:/java"; MediaLocator
objects create at run time - Java Interview Questions
objects create at run time  how to create objects at runtime,other than instantiation.  Hi friend, Object : Objects are the basic run time entity or in other words object is a instance of a class . An object
java code to insert select at run time....????
java code to insert select at run time....????  java database code...;/html> 2)edit.jsp: <%@page language="java"%> <%@page import... the application Java Swing then Visit Here   You can also visit
Polymorphism - Java Beginners
Polymorphism  type of polymorphism  In Java polymorphism... Or we can also say that a polymorphism is possible in both state Static and Dynamic. Coz polymorphism means in many forms. So do not get confused of it just
polymorphism - Java Beginners
polymorphism  what is polymorphism? what is the advantage of function..., Please visit the following links: http://www.roseindia.net/help/java/m/method-overloading-in-java.shtml http://www.roseindia.net/java/master-java/method
Run time exception
Run time exception  What class of exceptions are generated by the Java run-time system?  Java runtime system generates RuntimeException and Error exceptions
What is Polymorphism in Java?
Polymorphism in Java means a subclass, though having its own unique behavior... words Polymorphism in Java helps an object to decide which method implementation... it becomes easy to change code to support new implementation. Polymorphism in Java
Dynamic Polymorphism - Java Beginners
Dynamic Polymorphism  Develop with suitable hierarchy, classes for Point, Shape, Rectangle, Square, Circle, Ellipse, Triangle, Polygon, etc. Design a simple test application to demonstrate dynamic polymorphism.? Thanks
Dynamic polymorphism - Java Beginners
Dynamic polymorphism  Develop with suitable hierarchy, classes for point, shape, rectangele, square, circle,ellipse, triangle, polygon, etc. Design a simple test application to demonstrate dynamic polymorphism.. Thanks
java run time textfield and use with map - Java Beginners
java run time textfield and use with map  i want to program which read data from file and store in map and display in different textfields which are generated at run time like a text file store information class a1
Run time error - WebSevices
Run time error  Hello, Anyone know, how run the template files in zend framework.Anybody help me. Rgds, Pras  code to help in solving the problem : protected function _run($template
polymorphism
polymorphism  can we achieve without overriding polymorphism
get integer at run time
get integer at run time  how to get integer value at run time in j2ee using servlets   Hi, You can get the value from request parameter and then convert using the function Integer.parseInt(variable). Here
Run time problem
Run time problem  when i run a project,it shows an exception like "unable to create MIDlet".It also shows "running with locale:English_united States.1252 running in the identified third party security domain" "please help
Inheretance and polymorphism - Java Beginners
information on Java Visit to : http://www.roseindia.net/java/java-conversion/how
Inheretance and polymorphism - Java Beginners
information. http://www.roseindia.net/java/language/inheritance.shtml http://www.roseindia.net/java/beginners/oop-in-java.shtml Thanks
run time error
run time error  my program compile successfully but does not showing output for any program ...   Post your code.   public class HelloWorld { public static void main(String[] args) { System.out.println
Polymorphism
Polymorphism  If I have a class A and method m1(int a) and another class B that extends A and also having method m1(int y,int x)... Which method is to be called is decided at what time(run time or compile time) when we write
How to find run time in SQL.
How to find run time in SQL.  I have 10 backend jobs in sql which runs at different time intervals. Sample data is shown below Table name:- Job_Run... 22/10/2010 17:30:00 I want to find the run time of both the jobs. (i.e when i run
JSP handle run-time exceptions
JSP handle run-time exceptions  How does JSP handle run-time exceptions?   You can use the errorPage attribute of the page directive to have uncaught run-time exceptions automatically forwarded to an error processing
jdbc run time error - JDBC
jdbc run time error  i m creating the table using thin driver it is showing the following run time error: Exception in thread "main" java.lang.ClassNotFoundException: jdbc.oracle.OracleD river
How to stop java scripting engine when the script being run is taking too much time?
How to stop java scripting engine when the script being run is taking too much time?   How to stop java scripting engine when the script being run is taking too much time? for e,g, in case of infinite loop the memory is getting
Java question to implement polymorphism - Java Beginners
Java question to implement polymorphism  I have a question that i need to answer:- Using the principle of polymorphism provide implementation for the calculateFees() method for each Online Fax Subscription type
Polymorphism in Java 7
This tutorial describe concept of Polymorphism. It is one of OOPs concept
( Inheritance,need help in Polymorphism, Overriding) - Java Beginners
( Inheritance,need help in Polymorphism, Overriding)  can any one please help me create this application,thank you Advanced Concepts with Classes( Inheritance, Polymorphism, Overriding) Employees in a company are divided
Threads(suspend(),resume()) run time abnormal behaviour
Threads(suspend(),resume()) run time abnormal behaviour   class...=new Thread(this); t.start(); } public void run..."); a1.t.resume(); } } hi! when i run this code after some seconds
Data transfer object at run time - Development process
Data transfer object at run time  I have to assign data from resulset to data transfer object.. but i don't know the the number of coloums in selected table. So i have creted a Data Object class with 100 getter setter methods
runtime polymorphism - Development process
runtime polymorphism  how run time polymorphism is achieved  Hi Friend, The run-time polymorphism is basically the Method... information,please visit the following links: http://www.roseindia.net/java/master
dynamic polymorphism
dynamic polymorphism  give an example for dynamic polymorphism?   Dynamic polymorphism is where a class overrides a superclass method...() method and provide its own implementation, and this is known at compile time
best os to run java
best os to run java  which is best os to run java program
how to run - Java Beginners
how to run   how to run java program... brifely  Hi Friend, Java Virtual Machine is responsible for running java program.Java uses... to execute or run the program. For ex, If you have the following java program
java not run on my pc
java not run on my pc  i have installed java in pc but when i run and compile any program the massage is display that 'javac' is not recognized as an internal or external command
compile and run java program
compile and run java program  Hello, everyone!!! I just want to ask if you anyone here knows how to compile java file in linux specifically UBUNTU. For example, I have a java file named Hello.java and saved at my desktop. how
( Inheritance, Polymorphism, Overriding)i need help - Java Beginners
( Inheritance, Polymorphism, Overriding)i need help  Advanced Concepts with Classes( Inheritance, Polymorphism, Overriding) i need help to create this application,than you Employees in a company are divided into the classes
how to run java program
how to run java program  i have jar file. in jar i have so many classes.in one of file i want modify .after modifying file i want replce in jar. please help me to how to generate class and how to replace
run a java application - Java Beginners
run a java application  Hai Deepak, I ve set my environment...$1.class,SwingDemo$2.class.But i couldnt run my file.During run time it gives... run any java file.So i want to know the problem actually i had.Thanks in advance
Polymorphism : Method Overloading
In this tutorial you will learn one of polymorphism concept that is method overloading with example in Java 7
java pages run
java pages run  how do we run jsp file in the browser. do we need to install server. could it be run on the xamp server   You need Apache Tomcat Server to run the jsp code over it. Follow these steps to run the simple
Advertisements
 

 

 

DMCA.com